( ( Compositions ( ( each ( of which ) ) ( contains ( both ( ( ( an ( organic compound ) ) and ) ( an ( inorganic ( ( compound or ) element ) ) ) ) ) ) ) ) . )
(ROOT (FRAG (NP (NP (NNS Compositions)) (SBAR (WHNP (NP (DT each)) (WHPP (IN of) (WHNP (WDT which)))) (S (VP (VBZ contains) (NP (PDT both) (NP (DT an) (JJ organic) (NN compound)) (CC and) (NP (DT an) (JJ inorganic) (NN compound) (CC or) (NN element))))))) (. .)))
Compositions each of which contains both an organic compound and an inorganic compound or element.
(ROOT (S (NP (DT The) (NN term) (NN percent) (NN composition)) (VP (VBZ means) (NP (DT the) (NN percentage)) (PP (IN by) (NP (NP (NN mass)) (PP (IN of) (NP (NP (DT each) (NN element)) (PP (IN in) (NP (DT a) (NN compound)))))))) (. .)))