sporadic bursts of liveliness , some so-so slapstick 
(ROOT (NP (NP (NP (JJ sporadic) (NNS bursts)) (PP (IN of) (NP (NN liveliness)))) (, ,) (NP (DT some) (ADJP (ADJP (RB so) (HYPH -) (RB so)) (JJ slapstick)))))
(ROOT (NP (NP (NP (JJ ) (NNS )) (PP (IN ) (NP (NN )))) (, ) (NP (DT ) (ADJP (ADJP (RB ) (HYPH ) (RB )) (JJ )))))