Complex sentence: Towne retaliated by demanding that the name of his dog (P.H. Vazak) appear in the screen credit for his screenplay; the name received an Oscar nomination for best adapted screenplay.
Split into simpler sentences: Towne retaliated by demanding that the name of his dog (P.H. Vazak) appear in the screen credit for his screenplay. Ironically, P.H. Vazak received an Oscar nomination for best adapted screenplay.