Complex sentence: The first Socialist Party of Canada was formed by the Dominion Executive Committee of the Socialist Party of Canada by merging the provincial Socialist Party of British Columbia and related groups representing socialists in the provinces of Manitoba and Ontario.
Split into simpler sentences: The first Socialist Party of Canada is formed by the Dominion Executive Committee of the Socialist Party of Canada. By merging the provincial Socialist Party of British Columbia and related groups representing socialists in the provinces of Manitoba and Ontario.