( Valves ( There ( ( are ( ( four ( one-way valves ) ) ( separating ( ( the chambers ) ( of ( the heart ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Valves)) (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (JJ one-way) (NNS valves)) (VP (VBG separating) (NP (NP (DT the) (NNS chambers)) (PP (IN of) (NP (DT the) (NN heart))))))) (. .)))
Valves There are four one-way valves separating the chambers of the heart.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (NNS valves)) (PP (IN in) (NP (DT the) (NN heart))))) (. .)))