Table 2.

Statistics of annotated data

Statistics	Training Set	Test Set
No. of sentences	4000	1000
No. of words	84 830	21 036
No. of unique words	8108	3405
No. of body part mentions	1002	258
No. of chem mentions	2181	538
No. of device mentions	1545	406
No. of event mentions	1784	545
No. of flavor mentions	176	13
No. of num mentions	1353	389
No. of people mentions	7607	1888
No. of time mentions	1019	221
No. of unit mentions	227	201