legislation_cosponsors: 110-hr-4131, C000714

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
110-hr-4131	C000714	Rep. Conyers, John, Jr. [D-MI-14]	D	MI	2007-11-09	1