that underlies the best of comedies 
(ROOT (SBAR (WHNP (DT that)) (S (VP (VBZ underlies) (NP (NP (DT the) (JJS best)) (PP (IN of) (NP (NNS comedies))))))))
(ROOT (SBAR (WHNP (DT )) (S (VP (VBZ ) (NP (NP (DT ) (JJS )) (PP (IN ) (NP (NNS ))))))))