kinnear and dafoe give what may be the performances of their careers . 
(ROOT (S (NP (NNP kinnear) (CC and) (NNP dafoe)) (VP (VBP give) (SBAR (WHNP (WP what)) (S (VP (MD may) (VP (VB be) (NP (NP (DT the) (NNS performances)) (PP (IN of) (NP (PRP$ their) (NNS careers))))))))) (. .)))
(ROOT (S (NP (NNP ) (CC ) (NNP )) (VP (VBP ) (SBAR (WHNP (WP )) (S (VP (MD ) (VP (VB ) (NP (NP (DT ) (NNS )) (PP (IN ) (NP (PRP$ ) (NNS ))))))))) (. )))