legislation_cosponsors: 99-hr-3172, Y000014

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-3172	Y000014	Rep. Yatron, Gus [D-PA-6]	D	PA	1985-08-01	1