Complex sentence: Moderates like Forke had returned to the Liberal party (as Liberal-Progressives) and the Progressives reconstituted themselves as parliamentary representatives of the UFA and some of them continued to sit in parliament until they were routed by Social Credit in the election of 1935.
Split into simpler sentences: Moderates like Forke had returned to the Liberal party (as Liberal-Progressives), and the Progressives reconstituted themselves as parliamentary representatives of the UFA. Some of them continued to sit in Parliament until they were routed by the Social Credit Party of Canada in the election of 1935.