the film is the cast , particularly the ya-yas themselves . 
(ROOT (S (NP (DT the) (NN film)) (VP (VBZ is) (NP (NP (DT the) (NN cast)) (, ,) (NP (NP (ADVP (RB particularly)) (DT the) (NNP ya-) (NNP yas)) (NP (PRP themselves))))) (. .)))
(ROOT (S (NP (DT ) (NN )) (VP (VBZ ) (NP (NP (DT ) (NN )) (, ) (NP (NP (ADVP (RB )) (DT ) (NNP ) (NNP )) (NP (PRP ))))) (. )))