id	sid	eid	entity	type
chd-13	1	1	keshav k. singh	PERSON
chd-13	1	2	ph.d	ORG
chd-13	1	3	today	DATE
chd-13	2	1	the past several decades	DATE
chd-13	4	1	american	NORP
chd-13	4	2	asian	NORP
chd-13	5	1	americans	NORP
chd-13	5	2	african-americans	NORP
chd-13	5	3	caucasians	NORP
chd-13	16	1	25739530	CARDINAL
chd-13	16	2	singh	GPE
chd-13	16	3	2017	CARDINAL
chd-13	19	1	doi:10.9777	PERSON