, this is one of the best-sustained ideas i have ever seen on the screen . 
(ROOT (S (, ,) (NP (DT this)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS best) (HYPH -) (VBN sustained)) (NNS ideas)) (SBAR (S (NP (PRP i)) (VP (VBP have) (ADVP (RB ever)) (VP (VBN seen) (PP (IN on) (NP (DT the) (NN screen))))))))))) (. .)))
(ROOT (S (, ) (NP (DT )) (VP (VBZ ) (NP (NP (CD )) (PP (IN ) (NP (NP (DT ) (ADJP (RBS ) (HYPH ) (VBN )) (NNS )) (SBAR (S (NP (PRP )) (VP (VBP ) (ADVP (RB )) (VP (VBN ) (PP (IN ) (NP (DT ) (NN ))))))))))) (. )))