by having the evil aliens ' laser guns actually hit something for once 
(ROOT (PP (IN by) (S (VP (VBG having) (S (NP (NP (DT the) (JJ evil) (NNS aliens) (POS ')) (NN laser) (NNS guns)) (ADVP (RB actually)) (VP (VB hit) (NP (NN something)) (PP (IN for) (ADVP (RB once)))))))))
(ROOT (PP (IN ) (S (VP (VBG ) (S (NP (NP (DT ) (JJ ) (NNS ) (POS )) (NN ) (NNS )) (ADVP (RB )) (VP (VB ) (NP (NN )) (PP (IN ) (ADVP (RB )))))))))