be depressing , as the lead actor phones in his autobiographical performance 
(ROOT (S (VP (VB be) (ADJP (JJ depressing)) (, ,) (SBAR (IN as) (S (NP (DT the) (JJ lead) (NN actor)) (VP (NNS phones) (PP (IN in) (NP (PRP$ his) (JJ autobiographical) (NN performance)))))))))
(ROOT (S (VP (VB ) (ADJP (JJ )) (, ) (SBAR (IN ) (S (NP (DT ) (JJ ) (NN )) (VP (NNS ) (PP (IN ) (NP (PRP$ ) (JJ ) (NN )))))))))