a three-hour cinema master class . 
(ROOT (NP (DT a) (NML (CD three) (HYPH -) (NN hour)) (NML (NN cinema) (NN master)) (NN class) (. .)))
(ROOT (NP (DT ) (NML (CD ) (HYPH ) (NN )) (NML (NN ) (NN )) (NN ) (. )))