are worth the price of admission 
(ROOT (VP (VBP are) (ADJP (JJ worth) (NP (NP (DT the) (NN price)) (PP (IN of) (NP (NN admission)))))))
(ROOT (VP (VBP ) (ADJP (JJ ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))))))