`` gangs '' is never lethargic 
(ROOT (S (`` ``) (NP (NNS gangs)) ('' '') (VP (VBZ is) (ADVP (RB never)) (ADJP (JJ lethargic)))))
(ROOT (S (`` ) (NP (NNS )) ('' ) (VP (VBZ ) (ADVP (RB )) (ADJP (JJ )))))