legislation_cosponsors: 99-hr-5570, B000648

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
99-hr-5570	B000648	Rep. Bosco, Douglas H. [D-CA-1]	D	CA	1986-09-22	1