legislation_cosponsors: 99-hr-4889, B000620

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-4889	B000620	Rep. Bonker, Don [D-WA-3]	D	WA	1986-06-17	1