legislation_cosponsors: 99-sconres-89, B001210

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-sconres-89	B001210	Sen. Byrd, Robert C. [D-WV]	D	WV	1985-11-21	1