impressed by the skill of the actors involved in the enterprise 
(ROOT (S (VP (VBN impressed) (PP (IN by) (NP (NP (DT the) (NN skill)) (PP (IN of) (NP (NP (DT the) (NNS actors)) (VP (VBN involved) (PP (IN in) (NP (DT the) (NN enterprise)))))))))))
(ROOT (S (VP (VBN ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (NNS )) (VP (VBN ) (PP (IN ) (NP (DT ) (NN )))))))))))