Complex sentence: The tour began on November 1974 in Chicago and ended on 22 May 1975 in Besançon, France, and was staged to promote their 1974 concept album of the same name.
Split into simpler sentences: The tour began on November 1974 in Chicago and ended on 22 May 1975 in Besançon, France. It was staged to promote their 1974 concept album of the same name.