( ( The ( tricuspid valve ) ) ( ( is ( one ( of ( ( four valves ) ( located ( in ( the heart ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ tricuspid) (NN valve)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (CD four) (NNS valves)) (VP (VBN located) (PP (IN in) (NP (DT the) (NN heart)))))))) (. .)))
The tricuspid valve is one of four valves located in the heart.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (NNS valves)) (PP (IN in) (NP (DT the) (NN heart))))) (. .)))