( ( ( ( ( The cycle ) ( is repeated ) ) and ) ( ( the ( water hyacinth ) ) ( is ( kept ( under control ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NN cycle)) (VP (VBZ is) (VP (VBN repeated)))) (CC and) (S (NP (DT the) (NN water) (NN hyacinth)) (VP (VBZ is) (VP (VBN kept) (PP (IN under) (NP (NN control)))))) (. .)))
The cycle is repeated and the water hyacinth is kept under control.
(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.