( ( The ( recycled steam ) ) ( ( is ( ( returned ( as water ) ) ( to ( the ( boiler ( to ( repeat ( the cycle ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ recycled) (NN steam)) (VP (VBZ is) (VP (VBN returned) (PP (IN as) (NP (NN water))) (PP (TO to) (NP (DT the) (NN boiler) (S (VP (TO to) (VP (VB repeat) (NP (DT the) (NN cycle))))))))) (. .)))
The recycled steam is returned as water to the boiler to repeat the cycle.
(ROOT (S (NP (DT The) (NN water) (NN cycle)) (VP (VBZ ends) (SBAR (IN with) (S (NP (PRP it)) (VP (VBZ repeats) (NP (PRP itself)))))) (. .)))
The water cycle ends with it repeats itself.