Complex sentence: The album reached number one in the UK on its initial release and opens with his successful debut single "In the Air Tonight", which had a dark mood inspired by the separation from his wife Andrea and rose to number two in the UK.
Split into simpler sentences: The album reached number one in the UK on its initial release. It opens with his successful debut single "In the Air Tonight", which had a dark mood inspired by the separation from his wife Andrea and rose to number two in the UK.