Complex sentence: With the election of the Alberta Progressive Conservatives in 1971, Social Credit gradually collapsed while the Alberta Liberal Party suffered due to its links with the federal Liberal Party of Canada government of Pierre Trudeau which was very unpopular in Alberta.
Split into simpler sentences: With the election of the Alberta Progressive Conservatives in 1971, Social Credit gradually collapsed. The Alberta Liberal Party suffered due to its links with the federal Liberal Party of Canada government of Pierre Trudeau, which was very unpopular in Alberta.