the performances are strong , though the subject matter demands acting that borders on hammy at times . 
(ROOT (S (NP (DT the) (NNS performances)) (VP (VBP are) (ADJP (JJ strong)) (, ,) (SBAR (IN though) (S (NP (DT the) (NN subject) (NN matter)) (VP (VBZ demands) (NP (NP (NN acting)) (SBAR (WHNP (WDT that)) (S (VP (NNS borders) (PP (IN on) (NP (NN hammy))) (PP (IN at) (NP (NNS times))))))))))) (. .)))
(ROOT (S (NP (DT ) (NNS )) (VP (VBP ) (ADJP (JJ )) (, ) (SBAR (IN ) (S (NP (DT ) (NN ) (NN )) (VP (VBZ ) (NP (NP (NN )) (SBAR (WHNP (WDT )) (S (VP (NNS ) (PP (IN ) (NP (NN ))) (PP (IN ) (NP (NNS ))))))))))) (. )))