( This ( ( creates ( ( ( ( steam , ) ( since ( ( the water ) ( is heated ) ) ) ) , ) ( which ( ( is then ) ( used ( to ( drive ( ( ( the ( steam turbine ) ) , ) ( which ( ( ( powers ( the generator ) ) and ) ( creates electricity ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ creates) (NP (NP (NN steam)) (, ,) (SBAR (IN since) (S (NP (DT the) (NN water)) (VP (VBZ is) (ADJP (JJ heated))))) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB then)) (VP (VBN used) (S (VP (TO to) (VP (VB drive) (NP (NP (DT the) (NN steam) (NN turbine)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBZ powers) (NP (DT the) (NN generator))) (CC and) (VP (VBZ creates) (NP (NN electricity)))))))))))))))) (. .)))
This creates steam, since the water is heated, which is then used to drive the steam turbine, which powers the generator and creates electricity.
(ROOT (S (NP (DT This) (NN heat)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB convert) (NP (NN water)) (PP (IN into) (NP (NP (NN steam)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB then)) (VP (VBN used) (S (VP (TO to) (VP (VB turn) (NP (DT a) (NN turbine))))))))))) (, ,) (S (ADVP (RB thus)) (VP (VBG generating) (NP (JJ electrical) (NN power))))))))) (. .)))