legislation_cosponsors: 99-sres-144, Z000013

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-sres-144	Z000013	Sen. Zorinsky, Edward [D-NE]	D	NE	1985-04-26	1