( Lipids ( ( are ( ( long chains ) ( of ( carbon ( and ( hydrogen molecules ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Lipids)) (VP (VBP are) (NP (NP (JJ long) (NNS chains)) (PP (IN of) (NP (NN carbon) (CC and) (NN hydrogen) (NNS molecules))))) (. .)))
Lipids are long chains of carbon and hydrogen molecules.
(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))))))))) (. .)))