Table 1: Performance of Textual Retrieval with One Field

Datasets	MAP	Bpref	P@5	P@10	P@30	rel_ret
2009	0.4025	0.4281	0.6480	0.5840	0.5547	1870/2362
2010	0.3680	0.7249	0.5125	0.4125	0.2729	769/999