( ( Density ( of ( an object ) ) ) ( ( is ( ( the amount ) ( of ( matter ( in ( ( a ( given amount ) ) ( of ( ( space or ) volume ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Density)) (PP (IN of) (NP (DT an) (NN object)))) (VP (VBZ is) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN matter)) (PP (IN in) (NP (NP (DT a) (VBN given) (NN amount)) (PP (IN of) (NP (NN space) (CC or) (NN volume))))))))) (. .)))
Density of an object is the amount of matter in a given amount of space or volume.
(ROOT (S (NP (NNP Density)) (VP (VBZ describes) (SBAR (WHADJP (WRB how) (JJ much)) (S (NP (NN matter)) (VP (VBZ is) (PP (IN in) (NP (NP (DT a) (JJ certain) (NN amount)) (PP (IN of) (NP (NN space))))))))) (. .)))