( ( A liquid ) ( ( is ( ( a substance ) ( which ( has ( ( a ( definite volume ) ) ( but ( no ( definite shape ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN liquid)) (VP (VBZ is) (NP (NP (DT a) (NN substance)) (SBAR (WHNP (WDT which)) (S (VP (VBZ has) (NP (NP (DT a) (JJ definite) (NN volume)) (PP (CC but) (NP (DT no) (JJ definite) (NN shape))))))))) (. .)))
A liquid is a substance which has a definite volume but no definite shape.
(ROOT (S (NP (NN Liquid)) (VP (VBZ has) (NP (NP (DT a) (JJ definite) (NN volume)) (, ,) (CONJP (CC but) (RB not)) (NP (DT a) (JJ definite) (NN shape)))) (. .)))