( ( A lipid ) ( ( is ( ( a ( hydrocarbon compound ) ) ( ( in which ) ( ( the ( hydrogen ( and ( carbon atoms ) ) ) ) ( are ( linked ( in ( a ( long chain ) ) ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (DT A) (NN lipid)) (VP (VBZ is) (NP (NP (DT a) (NN hydrocarbon) (NN compound)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT the) (NN hydrogen) (CC and) (NN carbon) (NNS atoms)) (VP (VBP are) (VP (VBN linked) (PP (IN in) (NP (DT a) (JJ long) (NN chain))))))))) (: ;)))
A lipid is a hydrocarbon compound in which the hydrogen and carbon atoms are linked in a long chain;
(ROOT (S (NP (NNS Lipids)) (VP (VBP are) (VP (VBN made) (PP (IN of) (NP (NP (JJ long) (NNS chains)) (VP (VBG consisting) (NP (NP (RB almost) (RB solely)) (PP (IN of) (NP (NN carbon) (CC and) (NN hydrogen))))))))) (. .)))