Complex sentence: Thematically, the show was divided into two main acts; the first act which ran for an hour consisted mainly of older material from Prince's earlier albums, often strung together into medley form to ease time constraints.
Split into simpler sentences: Thematically, the show was divided into two main acts. Act One, which ran for an hour, consisted mainly of older material from Prince's earlier albums, often strung together into medley form to ease time constraints.