( ( ( The ( heat energy ) ) ( produced ( by ( the sun ) ) ) ) ( ( is immense ) . ) )
(ROOT (S (NP (NP (DT The) (NN heat) (NN energy)) (VP (VBN produced) (PP (IN by) (NP (DT the) (NN sun))))) (VP (VBZ is) (NP (NN immense))) (. .)))
The heat energy produced by the sun is immense.
(ROOT (S (NP (NP (NNS Producers)) (PP (IN in) (NP (DT an) (NN ecosystem)))) (ADVP (RB generally)) (VP (VB get) (NP (PRP$ their) (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))