legislation_cosponsors: 111-hres-975, L000551

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-975	L000551	Rep. Lee, Barbara [D-CA-9]	D	CA	2009-12-15	1