Table 3.

Experimental settings for temporal event extraction and evaluation

	Lexical	Syntactic	UMLS	Data selection	No. of records
Baseline	∙				180
CRF (run1)	∙	∙			180
CRF (run2)	∙	∙	∙		180
Semi-CRF (run3)	∙	∙	∙	Random selection	300
Semi-CRF (run4)	∙	∙	∙	K-means clustering	500
Semi-CRF (run5)	∙	∙	∙	K-means clustering	900