( Hydropower ( ( is ( ( the ( nation 's ) ) ( leading ( renewable ( energy source ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Hydropower)) (VP (VBZ is) (NP (NP (DT the) (NN nation) (POS 's)) (JJ leading) (NN renewable) (NN energy) (NN source))) (. .)))
Hydropower is the nation's leading renewable energy source.
(ROOT (S (NP (NNP Hydropower)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (RB widely) (VBN used)) (NN form)) (PP (IN of) (NP (NP (JJ renewable) (NN energy)) (PP (IN in) (NP (DT the) (NN world))))))) (. .)))