legislation_cosponsors: 99-hconres-39, K000009

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-hconres-39	K000009	Rep. Kaptur, Marcy [D-OH-9]	D	OH	1985-01-24	1