considerable skill and determination , backed by sheer nerve 
(ROOT (NP (NP (JJ considerable) (NN skill) (CC and) (NN determination)) (, ,) (VP (VBN backed) (PP (IN by) (NP (JJ sheer) (NN nerve))))))
(ROOT (NP (NP (JJ ) (NN ) (CC ) (NN )) (, ) (VP (VBN ) (PP (IN ) (NP (JJ ) (NN ))))))