( ( At ( ( the end ) ( of ( the cycle ) ) ) ) ( , ( it ( merely ( ( repeated ( the process ) ) . ) ) ) ) )
(ROOT (S (PP (IN At) (NP (NP (DT the) (NN end)) (PP (IN of) (NP (DT the) (NN cycle))))) (, ,) (NP (PRP it)) (ADVP (RB merely)) (VP (VBD repeated) (NP (DT the) (NN process))) (. .)))
At the end of the cycle, it merely repeated the process.
(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.