legislation_cosponsors: 99-hr-5484, C000312

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-5484	C000312	Rep. Chapman, Jim [D-TX-1]	D	TX	1986-09-08	1