Complex sentence: Manning R. Johnson was a witness in the perjury trial of Labor Leader Harry Bridges in 1949 and in 1953 testified before the Committee on Un-American Activities of the U.S. House of Representatives, 83rd Congress.
Split into simpler sentences: Manning R. Johnson was a witness in the perjury trial of Labor Leader Harry Bridges in 1949. In 1953 he testified before the Committee on Un-American Activities of the U.S. House of Representatives, 83rd Congress.