( ( ( These ( hydroelectric ( power stations ) ) ) ( use ( ( ( the flow ) ( of water ) ) ( to ( generate ( ( some or ) ( all ( of ( the electricity ) ) ) ) ) ) ) ) ) ( they ( produce . ) ) )
(ROOT (S (S (NP (DT These) (JJ hydroelectric) (NN power) (NNS stations)) (VP (VBP use) (S (NP (NP (DT the) (NN flow)) (PP (IN of) (NP (NN water)))) (VP (TO to) (VP (VB generate) (NP (NP (DT some)) (CC or) (NP (NP (DT all)) (PP (IN of) (NP (DT the) (NN electricity)))))))))) (NP (PRP they)) (VP (VBP produce)) (. .)))
These hydroelectric power stations use the flow of water to generate some or all of the electricity they produce.
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB generate) (NP (JJ hydroelectric) (NN power)) (PP (IN with) (NP (NP (DT the) (NN energy)) (VP (VBN found) (PP (IN in) (S (VP (VBG flowing) (NP (NN water)))))))))) (. .)))