( Solids ( ( are ( in ( ( ( a state ) ( of matter ) ) ( that ( maintains ( ( ( a ( fixed volume ) ) and ) shape ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Solids)) (VP (VBP are) (PP (IN in) (NP (NP (DT a) (NN state)) (PP (IN of) (NP (NN matter))) (SBAR (WHNP (WDT that)) (S (VP (VBZ maintains) (NP (NP (DT a) (VBN fixed) (NN volume)) (CC and) (NP (NN shape))))))))) (. .)))
Solids are in a state of matter that maintains a fixed volume and shape.
(ROOT (S (NP (NNP Solid)) (VP (VBZ is) (NP (NP (DT a) (NN form)) (PP (IN of) (NP (NN matter))) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (NP (NP (DT a) (JJ definite) (NN shape)) (CC and) (NP (NN volume)))))))) (. .)))