Complex sentence: Although they recall the events of 1958 only dimly, five of them return to Derry, but Stan, who is implied to still remember the entire thing, commits suicide by slitting his wrists while taking a bath.
Split into simpler sentences: Although they recall the events of 1958 only dimly, five of them return to Derry. However, Stan, who is implied to still remember the entire thing, commits suicide by slitting his wrists while taking a bath.