( ( ( volume , ) ( ( issue Terms ) ( used ( in ( describing periodicals ) ) ) ) ) . )
(ROOT (NP (NP (NN volume)) (, ,) (NP (NP (NN issue) (NNS Terms)) (VP (VBN used) (PP (IN in) (S (VP (VBG describing) (NP (NNS periodicals))))))) (. .)))
volume, issue Terms used in describing periodicals.
(ROOT (S (NP (DT The) (NN term) (NN volume)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (S (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN space)))) (ADJP (VBN occupied) (PP (IN by) (NP (NP (DT a) (NN sample)) (PP (IN of) (NP (NN matter)))))))))))) (. .)))