( ( High explosives ) ( ( are ( ( hydrocarbon compounds ) ( which ( ( give off ) ( vapours ( in ( various amounts ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ High) (NNS explosives)) (VP (VBP are) (NP (NP (NN hydrocarbon) (NNS compounds)) (SBAR (WHNP (WDT which)) (S (VP (VBP give) (PRT (RP off)) (NP (NP (NNS vapours)) (PP (IN in) (NP (JJ various) (NNS amounts))))))))) (. .)))
High explosives are hydrocarbon compounds which give off vapours in various amounts.
(ROOT (S (NP (DT A) (NN lipid)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT a) (ADJP (RB highly) (JJ diverse)) (NN group)) (PP (IN of) (NP (NP (NNS compounds)) (VP (VBN made) (PRT (RP up)) (ADVP (RB mostly))))) (PP (IN of) (NP (NNS hydrocarbons))))))) (. .)))