look behind the curtain that separates comics from the people laughing in the crowd . 
(ROOT (S (VP (VB look) (PP (IN behind) (NP (NP (DT the) (NN curtain)) (SBAR (WHNP (WDT that)) (S (VP (VBZ separates) (NP (NNS comics)) (PP (IN from) (NP (NP (DT the) (NNS people)) (VP (VBG laughing) (PP (IN in) (NP (DT the) (NN crowd)))))))))))) (. .)))
(ROOT (S (VP (VB ) (PP (IN ) (NP (NP (DT ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (NP (NNS )) (PP (IN ) (NP (NP (DT ) (NNS )) (VP (VBG ) (PP (IN ) (NP (DT ) (NN )))))))))))) (. )))