Complex sentence: Anderson stayed on the tour for three more months, but eventually left the show after being diagnosed with leukemia; he was replaced by Lawrence Clayton, who had appeared as Simon and understudied Judas in the previous national tour.
Split into simpler sentences: Anderson stayed on the tour for three more months, but eventually left the show after being diagnosed with leukemia. He was replaced by Lawrence Clayton, who had appeared as Simon and understudied Judas in the previous national tour.