( Currents ( ( are ( ( large ( moving rivers ) ) ( of ( water ( in ( the ocean ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Currents)) (VP (VBP are) (NP (NP (JJ large) (VBG moving) (NNS rivers)) (PP (IN of) (NP (NP (NN water)) (PP (IN in) (NP (DT the) (NN ocean))))))) (. .)))
Currents are large moving rivers of water in the ocean.
(ROOT (S (NP (DT A) (NN current)) (VP (VBZ is) (NP (NP (DT a) (NN stream)) (PP (IN of) (S (VP (VBG moving) (NP (NP (NN water)) (SBAR (WHNP (WDT that)) (S (VP (VBZ flows) (PP (IN through) (NP (DT the) (NN ocean)))))))))))) (. .)))