( ( The sun ) ( ( uses ( nuclear energy ) ) . ) )
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ uses) (NP (JJ nuclear) (NN energy))) (. .)))
The sun uses nuclear energy.
(ROOT (S (PP (IN Over) (NP (NP (CD 90) (NN %)) (PP (IN of) (NP (DT the) (NN energy))))) (NP (PRP we)) (VP (VBP use) (SBAR (S (VP (VBZ comes) (ADVP (RB originally)) (PP (IN from) (NP (DT the) (NN sun))))))) (. .)))