legislation_cosponsors: 101-hr-4073, M001057

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
101-hr-4073	M001057	Rep. Mrazek, Robert J. [D-NY-3]	D	NY	1990-03-15	0