Complex sentence: Show creator David Simon denied that the character of Tommy Carcetti was supposed to be O'Malley, though he did acknowledge that O'Malley was "one of several inspirations" for Carcetti.
Split into simpler sentences: Show creator David Simon denied that the character of Tommy Carcetti was supposed to be O'Malley. Simon did acknowledge that O'Malley was "one of several inspirations" for Carcetti.