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中心词驱动的短语结构句法分析器。该模型考虑了跟随介词短语的名词短语的中心词的作用。 有MIT大学Colling开发

21 Crude JJ as IN they PRP were VBD , , these DT early JJ PCs NNS triggered VBD explosive JJ product NN development NN in IN desktop NN models NNS for IN the DT home NN and CC office NN . .
11 Big JJ mainframe NN computers NNS for IN business NN had VBD been VBN around IN for IN years NNS . .
33 But CC the DT new JJ 1977 CD PCs NNS -- : unlike IN earlier JJR built-from-kit JJ types NNS such JJ as IN the DT Altair NNP , , Sol NNP and CC IMSAI NNP -- : had VBD keyboards NNS and CC could MD store VB about IN two CD pages NNS of IN data NNS in IN their PRP$ memories NNS . .
20 Current JJ PCs NNS are VBP more RBR than IN 50 CD times NNS faster RBR and CC have VBP memory NN capacity NN 500 CD times NNS greater JJR than IN their PRP$ 1977 CD counterparts NNS . .
7 There EX were VBD many JJ pioneer NN PC NN contributors NNS . .
33 William NNP Gates NNP and CC Paul NNP Allen NNP in IN 1975 CD developed VBD an DT early RB language-housekeeper JJ system NN for IN PCs NNS , , and CC Gates NNP became VBD an DT industry NN billionaire NN six CD years NNS after IN IBM NNP adapted VBD one CD of IN these DT versions NNS in IN 1981 CD . .
21 Alan NNP F. NNP Shugart NNP , , currently RB chairman NN of IN Seagate NNP Technology NNP , , led VBD the DT team NN that WDT developed VBD the DT disk NN drives NNS for IN PCs NNS . .
26 Dennis NNP Hayes NNP and CC Dale NNP Heatherington NNP , , two CD Atlanta NNP engineers NNS , , were VBD co-developers NNS of IN the DT internal JJ modems NNS that WDT allow VBP PCs NNS to TO share VB data NNS via IN the DT telephone NN . .
25 IBM NNP , , the DT world NN leader NN in IN computers NNS , , did VBD n't RB offer VB its PRP$ first JJ PC NN until IN August NNP 1981 CD as IN many JJ other JJ companies NNS entered VBD the DT market NN . .
12 Today NN , , PC NN shipments NNS annually RB total VBP some DT $ $ 38.3 CD billion CD world-wide JJ . .
23 F.H. NNP Faulding NNP & CC Co. NNP , , an DT Australian JJ pharmaceuticals NNS company NN , , said VBD its PRP$ Moleculon NNP Inc. NNP affiliate NN acquired VBD Kalipharma NNP Inc. NNP for IN $ $ 23 CD million CD . .
15 Kalipharma NNP is VBZ a DT New NNP Jersey-based JJ pharmaceuticals NNS concern NN that WDT sells VBZ products NNS under IN the DT Purepac NNP label NN . .
22 Faulding NNP said VBD it PRP owns VBZ 33 CD % NN of IN Moleculon NNP 's POS voting NN stock NN and CC has VBZ an DT agreement NN to TO acquire VB an DT additional JJ 19 CD % NN . .
28 That DT stake NN , , together RB with IN its PRP$ convertible JJ preferred JJ stock NN holdings NNS , , gives VBZ Faulding NNP the DT right NN to TO increase VB its PRP$ interest NN to TO 70 CD % NN of IN Moleculon NNP 's POS voting NN stock NN . .
46 Oil NN production NN from IN Australia NNP 's POS Bass NNP Strait NNP fields NNS will MD be VB raised VBN by IN 11,000 CD barrels NNS a DT day NN to TO about IN 321,000 CD barrels NNS with IN the DT launch NN of IN the DT Whiting NNP field NN , , the DT first JJ of IN five CD small JJ fields NNS scheduled VBN to TO be VB brought VBN into IN production NN before IN the DT end NN of IN 1990 CD . .
24 Esso NNP Australia NNP Ltd. NNP , , a DT unit NN of IN New NNP York-based JJ Exxon NNP Corp. NNP , , and CC Broken NNP Hill NNP Pty. NNP operate VBP the DT fields NNS in IN a DT joint JJ venture NN . .
9 Esso NNP said VBD the DT Whiting NNP field NN started VBD production NN Tuesday NNP . .
14 Output NN will MD be VB gradually RB increased VBN until IN it PRP reaches VBZ about IN 11,000 CD barrels NNS a DT day NN . .
9 The DT field NN has VBZ reserves NNS of IN 21 CD million CD barrels NNS . .
11 Reserves NNS for IN the DT five CD new JJ fields NNS total JJ 50 CD million CD barrels NNS . .
24 The DT Perch NNP and CC Dolphin NNP fields NNS are VBP expected VBN to TO start VB producing VBG early JJ next JJ year NN , , and CC the DT Seahorse NNP and CC Tarwhine NNP fields NNS later RB next JJ year NN . .
28 Esso NNP said VBD the DT fields NNS were VBD developed VBN after IN the DT Australian JJ government NN decided VBD in IN 1987 CD to TO make VB the DT first JJ 30 CD million CD barrels NNS from IN new JJ fields NNS free JJ of IN excise NN tax NN . .
34 R.P. NNP Scherer NNP Corp. NNP said VBD it PRP completed VBD the DT $ $ 10.2 CD million CD sale NN of IN its PRP$ Southern NNP Optical NNP subsidiary NN to TO a DT group NN led VBN by IN the DT unit NN 's POS president NN , , Thomas NNP R. NNP Sloan NNP , , and CC other JJ managers NNS . .
35 Following VBG the DT acquisition NN of IN R.P. NNP Scherer NNP by IN a DT buy-out NN group NN led VBN by IN Shearson NNP Lehman NNP Hutton NNP earlier RBR this DT year NN , , the DT maker NN of IN gelatin NN capsules NNS decided VBD to TO divest VB itself PRP of IN certain JJ of IN its PRP$ non-encapsulating JJ businesses NNS . .
12 The DT sale NN of IN Southern NNP Optical NNP is VBZ a DT part NN of IN the DT program NN . .
38 The DT White NNP House NNP said VBD President NNP Bush NNP has VBZ approved VBN duty-free JJ treatment NN for IN imports NNS of IN certain JJ types NNS of IN watches NNS that WDT are VBP n't RB produced VBN in IN `` `` significant JJ quantities NNS '' '' in IN the DT U.S. NNP , , the DT Virgin NNP Islands NNP and CC other JJ U.S. NNP possessions NNS . .
27 The DT action NN came VBD in IN response NN to TO a DT petition NN filed VBN by IN Timex NNP Inc. NNP for IN changes NNS in IN the DT U.S. NNP Generalized NNP System NNP of IN Preferences NNPS for IN imports NNS from IN developing VBG nations NNS . .
10 Previously RB , , watch NN imports NNS were VBD denied VBN such JJ duty-free JJ treatment NN . .
19 Timex NNP had VBD requested VBN duty-free JJ treatment NN for IN many JJ types NNS of IN watches NNS , , covered VBN by IN 58 CD different JJ U.S. NNP tariff NN classifications NNS . .
46 The DT White NNP House NNP said VBD Mr. NNP Bush NNP decided VBD to TO grant VB duty-free JJ status NN for IN 18 CD categories NNS , , but CC turned VBD down IN such JJ treatment NN for IN other JJ types NNS of IN watches NNS `` `` because IN of IN the DT potential JJ for IN material NN injury NN to TO watch VB producers NNS located VBN in IN the DT U.S. NNP and CC the DT Virgin NNP Islands NNP . . '' ''
30 Timex NNP is VBZ a DT major JJ U.S. NNP producer NN and CC seller NN of IN watches NNS , , including VBG low-priced JJ battery-operated JJ watches NNS assembled VBN in IN the DT Philippines NNPS and CC other JJ developing VBG nations NNS covered VBN by IN the DT U.S. NNP tariff NN preferences NNS . .
19 U.S. NNP trade NN officials NNS said VBD the DT Philippines NNPS and CC Thailand NNP would MD be VB the DT main JJ beneficiaries NNS of IN the DT president NN 's POS action NN . .
49 Imports NNS of IN the DT types NNS of IN watches NNS that WDT now RB will MD be VB eligible JJ for IN duty-free JJ treatment NN totaled VBD about IN $ $ 37.3 CD million CD in IN 1988 CD , , a DT relatively RB small JJ share NN of IN the DT $ $ 1.5 CD billion CD in IN U.S. NNP watch VBP imports NNS that IN year NN , , according VBG to TO an DT aide NN to TO U.S. NNP Trade NNP Representative NNP Carla NNP Hills NNP . .
34 Magna NNP International NNP Inc. NNP 's POS chief JJ financial JJ officer NN , , James NNP McAlpine NNP , , resigned VBD and CC its PRP$ chairman NN , , Frank NNP Stronach NNP , , is VBZ stepping VBG in IN to TO help VB turn VB the DT automotive-parts JJ manufacturer NN around IN , , the DT company NN said VBD . .
30 Mr. NNP Stronach NNP will MD direct VB an DT effort NN to TO reduce VB overhead NN and CC curb VB capital NN spending NN `` `` until IN a DT more RBR satisfactory JJ level NN of IN profit NN is VBZ achieved VBN and CC maintained VBN , , '' '' Magna NNP said VBD . .
13 Stephen NNP Akerfeldt NNP , , currently RB vice NN president NN finance NN , , will MD succeed VB Mr. NNP McAlpine NNP . .
22 An DT ambitious JJ expansion NN has VBZ left VBN Magna NNP with IN excess JJ capacity NN and CC a DT heavy JJ debt NN load NN as IN the DT automotive JJ industry NN enters VBZ a DT downturn NN . .
21 The DT company NN has VBZ reported VBN declines NNS in IN operating NN profit NN in IN each DT of IN the DT past JJ three CD years NNS , , despite IN steady JJ sales NNS growth NN . .
31 Magna NNP recently RB cut VBD its PRP$ quarterly JJ dividend NN in IN half NN and CC the DT company NN 's POS Class NNP A NNP shares NNS are VBP wallowing VBG far RB below IN their PRP$ 52-week JJ high JJ of IN 16.125 CD Canadian JJ dollars NNS -LRB- -LRB- US$ $ 13.73 CD -RRB- -RRB- . .
18 On IN the DT Toronto NNP Stock NNP Exchange NNP yesterday NN , , Magna NNP shares NNS closed VBD up IN 37.5 CD Canadian JJ cents NNS to TO C$ $ 9.625 CD . .
29 Mr. NNP Stronach NNP , , founder NN and CC controlling VBG shareholder NN of IN Magna NNP , , resigned VBD as IN chief JJ executive JJ officer NN last JJ year NN to TO seek VB , , unsuccessfully RB , , a DT seat NN in IN Canada NNP 's POS Parliament NNP . .
16 Analysts NNS said VBD Mr. NNP Stronach NNP wants VBZ to TO resume VB a DT more RBR influential JJ role NN in IN running VBG the DT company NN . .
10 They PRP expect VBP him PRP to TO cut VB costs NNS throughout IN the DT organization NN . .
21 The DT company NN said VBD Mr. NNP Stronach NNP will MD personally RB direct VB the DT restructuring NN , , assisted VBN by IN Manfred NNP Gingl NNP , , president NN and CC chief JJ executive NN . .
11 Neither DT they PRP nor CC Mr. NNP McAlpine NNP could MD be VB reached VBN for IN comment NN . .
19 Magna NNP said VBD Mr. NNP McAlpine NNP resigned VBD to TO pursue VB a DT consulting NN career NN , , with IN Magna NNP as IN one CD of IN his PRP$ clients NNS . .
22 Lord NNP Chilver NNP , , 63-year-old JJ chairman NN of IN English NNP China NNP Clays NNP PLC NNP , , was VBD named VBN a DT nonexecutive JJ director NN of IN this DT British JJ chemical NN company NN . .
25 Japanese JJ investors NNS nearly RB single-handedly RB bought VBD up RB two CD new JJ mortgage NN securities-based JJ mutual JJ funds NNS totaling VBG $ $ 701 CD million CD , , the DT U.S. NNP Federal NNP National NNP Mortgage NNP Association NNP said VBD . .
29 The DT purchases NNS show VBP the DT strong JJ interest NN of IN Japanese JJ investors NNS in IN U.S. NNP mortgage-based JJ instruments NNS , , Fannie NNP Mae NNP 's POS chairman NN , , David NNP O. NNP Maxwell NNP , , said VBD at IN a DT news NN conference NN . .
16 He PRP said VBD more JJR than IN 90 CD % NN of IN the DT funds NNS were VBD placed VBN with IN Japanese JJ institutional JJ investors NNS . .
11 The DT rest NN went VBD to TO investors NNS from IN France NNP and CC Hong NNP Kong NNP . .
19 Earlier RBR this DT year NN , , Japanese JJ investors NNS snapped VBD up RP a DT similar JJ , , $ $ 570 CD million CD mortgage-backed JJ securities NNS mutual JJ fund NN . .
15 That DT fund NN was VBD put VBN together RB by IN Blackstone NNP Group NNP , , a DT New NNP York NNP investment NN bank NN . .
23 The DT latest JJS two CD funds NNS were VBD assembled VBN jointly RB by IN Goldman NNP , , Sachs NNP & CC Co. NNP of IN the DT U.S. NNP and CC Japan NNP 's POS Daiwa NNP Securities NNP Co NNP . .
34 The DT new JJ , , seven-year JJ funds NNS -- : one CD offering NN a DT fixed-rate JJ return NN and CC the DT other JJ with IN a DT floating-rate JJ return NN linked VBN to TO the DT London NNP interbank NN offered VBD rate NN -- : offer VBP two CD key JJ advantages NNS to TO Japanese JJ investors NNS . .
36 First NNP , , they PRP are VBP designed VBN to TO eliminate VB the DT risk NN of IN prepayment NN -- : mortgage-backed JJ securities NNS can MD be VB retired VBN early RB if IN interest NN rates NNS decline VBP , , and CC such JJ prepayment NN forces NNS investors NNS to TO redeploy VB their PRP$ money NN at IN lower JJR rates NNS . .
18 Second JJ , , they PRP channel VBP monthly JJ mortgage NN payments NNS into IN semiannual JJ payments NNS , , reducing VBG the DT administrative JJ burden NN on IN investors NNS . .
27 By IN addressing VBG those DT problems NNS , , Mr. NNP Maxwell NNP said VBD , , the DT new JJ funds NNS have VBP become VBN `` `` extremely RB attractive JJ to TO Japanese JJ and CC other JJ investors NNS outside IN the DT U.S. NNP . . '' ''
34 Such JJ devices NNS have VBP boosted VBN Japanese JJ investment NN in IN mortgage-backed JJ securities NNS to TO more JJR than IN 1 CD % NN of IN the DT $ $ 900 CD billion CD in IN such JJ instruments NNS outstanding JJ , , and CC their PRP$ purchases NNS are VBP growing VBG at IN a DT rapid JJ rate NN . .
40 They PRP also RB have VBP become VBN large JJ purchasers NNS of IN Fannie NNP Mae NNP 's POS corporate JJ debt NN , , buying VBG $ $ 2.4 CD billion CD in IN Fannie NNP Mae NNP bonds NNS during IN the DT first JJ nine CD mo