legislation_cosponsors: 112-hr-4136, B001272

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-4136	B001272	Rep. Berg, Rick [R-ND-At Large]	R	ND	2012-03-26	0