NTCIR-7 ACLIA IR4QA Results based on Qrels Version 2.
['Tetsuya Sakai', 'Noriko Kando', 'Chuan-Jie Lin', 'Ruihua Song', 'Hideki Shima', 'Teruko Mitamura']
NTCIR-7 ACLIA IR4QA Results based on Qrels Version 2.