Complex sentence: Periander later tried to reconcile with Lycophron, but Lycophron refused to return unless Periander abdicated; however, the inhabitants of Corcyra killed Lycophron to prevent Periander from arriving.
Split into simpler sentences: Periander later tried to reconcile with Lycophron, but Lycophron refused to return unless Periander abdicated. However, the inhabitants of Corcyra killed Lycophron to prevent Periander from arriving.