legislation_cosponsors: 99-sjres-16, A000009

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-sjres-16	A000009	Sen. Abdnor, James [R-SD]	R	SD	1985-01-22	1