an hour and a half of joyful solo performance 
(ROOT (NP (NP (DT an) (NN hour) (QP (CC and) (DT a) (NN half))) (PP (IN of) (NP (JJ joyful) (JJ solo) (NN performance)))))
(ROOT (NP (NP (DT ) (NN ) (QP (CC ) (DT ) (NN ))) (PP (IN ) (NP (JJ ) (JJ ) (NN )))))