a backstage must-see for true fans 
(ROOT (NP (NP (DT a) (NN backstage) (MD must) (HYPH -) (VB see)) (PP (IN for) (NP (JJ true) (NNS fans)))))
(ROOT (NP (NP (DT ) (NN ) (MD ) (HYPH ) (VB )) (PP (IN ) (NP (JJ ) (NNS )))))