legislation_cosponsors: 111-hres-1503, S000810

Cosponsors for tracked legislation. Distinguishes original cosponsors (signed on at introduction) from later additions. Linked to congress_members via bioguide_id.

This data as json

bill_id	bioguide_id	full_name	party	state	sponsorship_date	is_original_cosponsor
111-hres-1503	S000810	Rep. Stark, Fortney Pete [D-CA-13]	D	CA	2010-09-15	0