( Reservoirs ( ( are ( ( holding ( ( ( 20 % ) less ) water ) ) ( than ( ( at ( this time ) ) ( last year ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Reservoirs)) (VP (VBP are) (VP (VBG holding) (NP (ADJP (NP (CD 20) (NN %)) (JJR less)) (NN water)) (ADVP (IN than) (PP (IN at) (NP (DT this) (NN time)) (NP (JJ last) (NN year)))))) (. .)))
Reservoirs are holding 20% less water than at this time last year.
(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))))))))))))) (. .)))