Complex sentence: In 1985, Molyneaux resigned his seat, along with Molyneaux's Unionist colleagues in the House of Commons, in protest at the Anglo-Irish Agreement and was re-elected in the subsequent by-election.
Split into simpler sentences: In 1985, Molyneaux resigned his seat, along with his unionist colleagues in the House of Commons, in protest at the Anglo-Irish Agreement. He was re-elected in the subsequent by-election.