( ( ( The ( water-holding ( cavity ( or ( water reservoir ) ) ) ) ) ( in time ) ) ( ( ( became ( an ( ink reservoir ) ) ) ( on ( later inkstones ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ water-holding) (NN cavity) (CC or) (NN water) (NN reservoir)) (PP (IN in) (NP (NN time)))) (VP (VBD became) (NP (DT an) (NN ink) (NN reservoir)) (PP (IN on) (NP (JJ later) (NNS inkstones)))) (. .)))
The water-holding cavity or water reservoir in time became an ink reservoir on later inkstones.
(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))))))))))))) (. .)))