legislation_cosponsors: 111-hr-4971, D000355

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-hr-4971	D000355	Rep. Dingell, John D. [D-MI-15]	D	MI	2010-07-30	0