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