Complex sentence: In 1965, with the assistance of Mr. Clifford Smith, a local electrical contractor, she organized and conducted the highly successful choral group The Men of Houston, made up of many fine singers in the community.
Split into simpler sentences: In 1965, with the assistance of Mr. Clifford Smith, a local electrical contractor, she organized and conducted the highly successful choral group. "The Men of Houston," made up of many fine singers in the community.