one of the most depressing movie-going experiences i can think of is to sit through about 90 minutes of a so-called ` comedy ' and not laugh once . 
(ROOT (S (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS most) (JJ depressing)) (ADJP (NN movie) (HYPH -) (NN going)) (NNS experiences)) (SBAR (S (NP (PRP i)) (VP (MD can) (VP (VB think) (PP (IN of))))))))) (VP (VBZ is) (S (VP (TO to) (VP (VP (VB sit) (PP (IN through) (NP (NP (QP (RB about) (CD 90)) (NNS minutes)) (PP (IN of) (NP (DT a) (ADJP (RB so) (HYPH -) (VBN called)) (`` `) (NN comedy) ('' ')))))) (CC and) (RB not) (VP (VB laugh) (ADVP (RB once))))))) (. .)))
(ROOT (S (NP (NP (CD )) (PP (IN ) (NP (NP (DT ) (ADJP (RBS ) (JJ )) (ADJP (NN ) (HYPH ) (NN )) (NNS )) (SBAR (S (NP (PRP )) (VP (MD ) (VP (VB ) (PP (IN ))))))))) (VP (VBZ ) (S (VP (TO ) (VP (VP (VB ) (PP (IN ) (NP (NP (QP (RB ) (CD )) (NNS )) (PP (IN ) (NP (DT ) (ADJP (RB ) (HYPH ) (VBN )) (`` ) (NN ) ('' )))))) (CC ) (RB ) (VP (VB ) (ADVP (RB ))))))) (. )))