based on the wonderful acting clinic put on by spader and gyllenhaal 
(ROOT (VP (VBN based) (PP (IN on) (NP (NP (DT the) (JJ wonderful) (NN acting) (NN clinic)) (VP (VBN put) (PRT (RP on)) (PP (IN by) (NP (NN spader) (CC and) (NN gyllenhaal))))))))
(ROOT (VP (VBN ) (PP (IN ) (NP (NP (DT ) (JJ ) (NN ) (NN )) (VP (VBN ) (PRT (RP )) (PP (IN ) (NP (NN ) (CC ) (NN ))))))))