are of the highest and the performances 
(ROOT (S (VP (VBP are) (PP (IN of) (NP (DT the) (JJS highest)))) (CC and) (NP (DT the) (NNS performances))))
(ROOT (S (VP (VBP ) (PP (IN ) (NP (DT ) (JJS )))) (CC ) (NP (DT ) (NNS ))))