( ( The reservoir ) ( ( failed ( to ( hold water ) ) ) . ) )
(ROOT (S (NP (DT The) (NN reservoir)) (VP (VBD failed) (S (VP (TO to) (VP (VB hold) (NP (NN water)))))) (. .)))
The reservoir failed to hold water.
(ROOT (S (NP (DT A) (NN reservoir)) (VP (VBZ is) (NP (NP (NN part)) (PP (IN of) (NP (NP (DT a) (NN cycle)) (SBAR (WHNP (WDT that)) (S (VP (VBZ holds) (NP (NP (DT an) (NN element) (CC or) (NN water)) (PP (IN for) (NP (NP (DT a) (JJ long) (NN period)) (PP (IN of) (NP (NN time))))))))))))) (. .)))