Complex sentence: On November 23,2008, for the first time Since leaving the group, Richardson rejoined his former bandmates on stage in Hollywood Palladium, Los Angeles, Performing the encore, "Shape of My Heart" with the group.
Split into simpler sentences: On November 23,2008, for the first time Since leaving the group, Richardson rejoined his former bandmates on stage in Hollywood Palladium, Los Angeles. He performed the encore, "Shape of My Heart" with the group.