should give `` scratch '' a second look 
(ROOT (S (VP (MD should) (VP (VB give) (`` ``) (NP (NN scratch)) ('' '') (NP (DT a) (JJ second) (NN look))))))
(ROOT (S (VP (MD ) (VP (VB ) (`` ) (NP (NN )) ('' ) (NP (DT ) (JJ ) (NN ))))))