( Volume ( ( is ( ( a measure ) ( of ( ( the amount ) ( of ( space ( occupied ( by ( an object ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Volume)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN space)) (ADJP (VBN occupied) (PP (IN by) (NP (DT an) (NN object)))))))))) (. .)))
Volume is a measure of the amount of space occupied by an object.
(ROOT (S (NP (NN Volume)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN space)))))) (SBAR (IN that) (S (NP (NP (DT a) (NN substance)) (CC or) (NP (DT an) (NN object))) (VP (VBZ occupies))))) (. .)))