( There ( ( are ( ( three classes ) ( of ( lipids ( in plants ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD three) (NNS classes)) (PP (IN of) (NP (NP (NNS lipids)) (PP (IN in) (NP (NNS plants))))))) (. .)))
There are three classes of lipids in plants.
(ROOT (S (NP (NNS Lipids)) (VP (VBP are) (ADJP (JJ available) (PP (TO to) (NP (NP (DT the) (NN body)) (PP (IN from) (NP (CD three) (NNS sources))))))) (. .)))