@article{oai:repository.dl.itc.u-tokyo.ac.jp:00000408,
 author = {OKANOHARA, DAISUKE and TSUJI, JUN'ICHI},
 issue = {3},
 journal = {自然言語処理},
 month = {Apr},
 note = {application/pdf},
 pages = {273--296},
 title = {Assigning Polarity Scores to Reviews Using Machine Learning Techniques},
 volume = {14},
 year = {2007}
}