just do n't work in concert . 
(ROOT (S (ADVP (RB just)) (VP (VB do) (RB n't) (VP (VB work) (PP (IN in) (NP (NN concert))))) (. .)))
(ROOT (S (ADVP (RB )) (VP (VB ) (RB ) (VP (VB ) (PP (IN ) (NP (NN ))))) (. )))