legislation_cosponsors: 112-hres-478, S000480

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
112-hres-478	S000480	Rep. Slaughter, Louise McIntosh [D-NY-28]	D	NY	2012-03-06	0