Complex sentence: He was sworn in as the Prime Minister on 22 April 1963 even though the support the Social Credit MPs was soon withdrawn, Pearson was able to maintain government with the support of the New Democratic Party.
Split into simpler sentences: He was sworn in as the Prime Minister on 22 April 1963. Even though the support the Social Credit MPs was soon withdrawn, Pearson was able to maintain government with the support of the New Democratic Party.