Table 2.

Statistics of the annotated dataset for TE extraction and normalization.

	#Patient	#Record	#Temporal expression
			#Date	#Time	#Duration	#Frequency	#All
Training set	170	1,076	10,205	4,500	6,821	6,916	28,442
Test set	111	702	6,800	2,868	4,214	4,184	18,066
Total	281	1,778	17,005	7,368	11,035	11,100	46,508