sit through about 90 minutes of a so-called ` comedy ' and not laugh 
(ROOT (S (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) (VB laugh))))
(ROOT (S (VP (VP (VB ) (PP (IN ) (NP (NP (QP (RB ) (CD )) (NNS )) (PP (IN ) (NP (DT ) (ADJP (RB ) (HYPH ) (VBN )) (`` ) (NN ) ('' )))))) (CC ) (RB ) (VB ))))