Complex sentence: After nominating Steven, Ashleigh and Chris jointly chose Mark to join the Power Alliance, later that day Ashleigh, Chris and Mark chose Ash to join Steven facing the public vote on Day 51.
Split into simpler sentences: After nominating Steven, Ashleigh and Chris jointly chose Mark to join the "Power Alliance". Later that day Ashleigh, Chris and Mark chose Ash to join Steven facing the public vote on Day 51.