weighs no more than a glass of flat champagne . 
(ROOT (S (VP (VBZ weighs) (NP (ADJP (RB no) (JJR more)) (PP (IN than) (NP (NP (DT a) (NN glass)) (PP (IN of) (NP (JJ flat) (NN champagne))))))) (. .)))
(ROOT (S (VP (VBZ ) (NP (ADJP (RB ) (JJR )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (JJ ) (NN ))))))) (. )))