once the expectation of laughter has been quashed by whatever obscenity is at hand , even the funniest idea is n't funny . 
(ROOT (S (SBAR (IN once) (S (NP (NP (DT the) (NN expectation)) (PP (IN of) (NP (NN laughter)))) (VP (VBZ has) (VP (VBN been) (VP (VBN quashed) (PP (IN by) (SBAR (WHNP (WDT whatever) (NN obscenity)) (S (VP (VBZ is) (PP (IN at) (NP (NN hand)))))))))))) (, ,) (NP (RB even) (DT the) (JJS funniest) (NN idea)) (VP (VBZ is) (RB n't) (ADJP (JJ funny))) (. .)))
(ROOT (S (SBAR (IN ) (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))) (VP (VBZ ) (VP (VBN ) (VP (VBN ) (PP (IN ) (SBAR (WHNP (WDT ) (NN )) (S (VP (VBZ ) (PP (IN ) (NP (NN )))))))))))) (, ) (NP (RB ) (DT ) (JJS ) (NN )) (VP (VBZ ) (RB ) (ADJP (JJ ))) (. )))