?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Extraction+of+Keyphrases+from+Text%3A+Evaluation+of+Four+Algorithms&rft.creator=Turney%2C+Peter&rft.subject=Language&rft.subject=Machine+Learning&rft.subject=Statistical+Models&rft.description=This+report+presents+an+empirical+evaluation+of+four+algorithms+for+automatically+extracting+keywords+and+keyphrases+from+documents.+The+four+algorithms+are+compared+using+five+different+collections+of+documents.+For+each+document%2C+we+have+a+target+set+of+keyphrases%2C+which+were+generated+by+hand.+The+target+keyphrases+were+generated+for+human+readers%3B+they+were+not+tailored+for+any+of+the+four+keyphrase+extraction+algorithms.+Each+of+the+algorithms+was+evaluated+by+the+degree+to+which+the+algorithm%C2%92s+keyphrases+matched+the+manually+generated+keyphrases.+The+four+algorithms+were+(1)+the+AutoSummarize+feature+in+Microsoft%C2%92s+Word+97%2C+(2)+an+algorithm+based+on+Eric+Brill%C2%92s+part-of-speech+tagger%2C+(3)+the+Summarize+feature+in+Verity%C2%92s+Search+97%2C+and+(4)+NRC%C2%92s+Extractor+algorithm.+For+all+five+document+collections%2C+NRC%C2%92s+Extractor+yields+the+best+match+with+the+manually+generated+keyphrases.+&rft.date=1997&rft.type=Departmental+Technical+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpostscript&rft.identifier=http%3A%2F%2Fcogprints.org%2F1803%2F1%2FERB-1051.ps&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1803%2F5%2FERB-1051.pdf&rft.identifier=++Turney%2C+Peter++(1997)+Extraction+of+Keyphrases+from+Text%3A+Evaluation+of+Four+Algorithms.++%5BDepartmental+Technical+Report%5D++++(Unpublished)++&rft.relation=http%3A%2F%2Fcogprints.org%2F1803%2F