the performances , for the most part , credible 
(ROOT (S (NP (DT the) (NNS performances)) (, ,) (PP (IN for) (NP (DT the) (JJS most) (NN part))) (, ,) (ADJP (JJ credible))))
(ROOT (S (NP (DT ) (NNS )) (, ) (PP (IN ) (NP (DT ) (JJS ) (NN ))) (, ) (ADJP (JJ ))))