is funny and pithy , while illuminating an era of theatrical comedy that , while past , 
(ROOT (VP (VBZ is) (ADJP (JJ funny) (CC and) (JJ pithy)) (, ,) (SBAR (IN while) (S (VP (VBG illuminating) (NP (NP (NP (DT an) (NN era)) (PP (IN of) (NP (JJ theatrical) (NN comedy)))) (SBAR (WHNP (WDT that)) (, ,) (SBAR (IN while) (FRAG (ADJP (NN past)))) (, ,))))))))
(ROOT (VP (VBZ ) (ADJP (JJ ) (CC ) (JJ )) (, ) (SBAR (IN ) (S (VP (VBG ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (JJ ) (NN )))) (SBAR (WHNP (WDT )) (, ) (SBAR (IN ) (FRAG (ADJP (NN )))) (, ))))))))