( Use ( some mothballs ) )
(ROOT (S (VP (VB Use) (NP (DT some) (NNS mothballs)))))
Use some mothballs
(ROOT (S (NP (NNS Naphthalens)) (VP (VBZ is) (NP (NP (DT a) (NN chemical)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB commonly)) (VP (VBN used) (PP (IN in) (NP (NNS mothballs))))))))) (. .)))