Complex sentence: When the American Federation of Labor ejected the unions that composed the Committee for Industrial Organization (CIO) in 1936, Murray supported Lewis's decision to form a new labor organization and was named a vice president in the new CIO.
Split into simpler sentences: When the American Federation of Labor ejected the unions which composed the Committee for Industrial Organization (CIO) in 1936, Murray supported Lewis' decision to form a new labor organization. Murray was named a vice president in the new CIO.