Yoshimi SuzukiFumiyo FukumotoYoshihiro SekiguchiKeyword Extraction of Radio News Using Term Weighting with an Encyclopedia and Newspaper Articles.373-3741998conf/sigir/98SIGIRSIGIR1998/P373.pdfhttps://doi.org/10.1145/290941.291062db/conf/sigir/sigir98.html#SuzukiFS98