( Volume ( ( ( describes ( ( the quantity ) ( of ( three ( dimensional space ) ) ) ) ) ( than ( ( an object ) occupies ) ) ) . ) )
(ROOT (S (NP (NN Volume)) (VP (VBZ describes) (NP (NP (DT the) (NN quantity)) (PP (IN of) (NP (CD three) (JJ dimensional) (NN space)))) (SBAR (IN than) (S (NP (DT an) (NN object)) (VP (VBZ occupies))))) (. .)))
Volume describes the quantity of three dimensional space than an object occupies.
(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))))) (. .)))