( There ( ( are ( ( three sources ) ( of ( energy ( available ( to us ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD three) (NNS sources)) (PP (IN of) (NP (NP (NN energy)) (ADJP (JJ available) (PP (TO to) (NP (PRP us)))))))) (. .)))
There are three sources of energy available to us.
(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))))))) (. .)))