Table 1.

Dataset overview.

Dataset	Sentence count	Entity count
		Named entity	Relationship${}^{+}$	Relationship${}^{-}$
Training
CT Head (CTH)	1398	6174	16,780	28,916
MRI Head (MRIH)	512	2878	3156	20,732
Xray pediatric (XPED)	512	4485	4138	34,588
Test
CT Head (CTH)	1074	3992	4381	25,004
MRI Head (MRIH)	423	1852	1901	9230
Xray pediatric (XPED)	213	1012	701	6578

Number of unique records per dataset as well as number of extracted (clinical) named entities and relationships.