just a kiss is a just a waste . 
(ROOT (S (NP (RB just) (DT a) (NN kiss)) (VP (VBZ is) (NP (DT a) (RB just) (DT a) (NN waste))) (. .)))
(ROOT (S (NP (RB ) (DT ) (NN )) (VP (VBZ ) (NP (DT ) (RB ) (DT ) (NN ))) (. )))