( ( ( The ( main difference ) ) ( between ( early ( water ( turbines ( and ( water wheels ) ) ) ) ) ) ) ( ( is ( ( a ( swirl component ) ) ( of ( ( the water ) ( which ( ( passes energy ) ( to ( a ( spinning rotor ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ main) (NN difference)) (PP (IN between) (NP (JJ early) (NN water) (NNS turbines) (CC and) (NN water) (NNS wheels)))) (VP (VBZ is) (NP (NP (DT a) (NN swirl) (NN component)) (PP (IN of) (NP (NP (DT the) (NN water)) (SBAR (WHNP (WDT which)) (S (VP (VBZ passes) (NP (NN energy)) (PP (TO to) (NP (DT a) (JJ spinning) (NN rotor)))))))))) (. .)))
The main difference between early water turbines and water wheels is a swirl component of the water which passes energy to a spinning rotor.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN component)) (PP (IN of) (NP (NN milk))))) (. .)))