the performances are an absolute joy . 
(ROOT (S (NP (DT the) (NNS performances)) (VP (VBP are) (NP (DT an) (JJ absolute) (NN joy))) (. .)))
(ROOT (S (NP (DT ) (NNS )) (VP (VBP ) (NP (DT ) (JJ ) (NN ))) (. )))