legislation_cosponsors: 112-hr-6572, D000604

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-hr-6572	D000604	Rep. Dent, Charles W. [R-PA-15]	R	PA	2012-10-12	1