( ( Nuclear energy ) ( produces ( heat ( on ( the sun ) ) ) ) )
(ROOT (S (NP (JJ Nuclear) (NN energy)) (VP (VBZ produces) (NP (NP (NN heat)) (PP (IN on) (NP (DT the) (NN sun)))))))
Nuclear energy produces heat on the sun
(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)))) (. .)))