legislation_cosponsors: 100-hr-4231, L000020

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
100-hr-4231	L000020	Rep. Lagomarsino, Robert J. [R-CA-19]	R	CA	1988-05-19	0