Complex sentence: Charlie Stubbs lived here for a while but after buying Number 6 Coronation Street, He moved there and leased the flat to Maria Sutherland, who he was having an affair with behind his girlfriend Tracy Barlow's back.
Split into simpler sentences: Charlie Stubbs lived here for a while but after buying Number 6 Coronation Street. He leased the flat to Maria Sutherland, who he was having an affair with behind his Tracy Barlow's back.