legislation_cosponsors: 99-hr-4879, S001139

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-4879	S001139	Rep. Synar, Mike [D-OK-2]	D	OK	1986-06-09	1