Complex sentence: Both of these presisted for several decades, the Social Credit eventually disappearing by 1980s, and the CCF merging with the Canadian Labour Congress to form the social democratic New Democratic Party (NDP) which played an important role in several minority governments and still exists today.
Split into simpler sentences: Both of these presisted for several decades, the Social Credit eventually disappearing by 1980s, and the CCF merging with the Canadian Labour Congress to form the social democratic New Democratic Party (NDP). The NDP played an important role in several minority governments and still exists today.