Jisheng Liang Krzysztof Koperski Thien Nguyen Giovanni B. Marchisio Extracting statistical data frames from text. 67-75 2005 7 SIGKDD Explorations 1 http://doi.acm.org/10.1145/1089815.1089825 db/journals/sigkdd/sigkdd7.html#LiangKNM05