( ( Hearts ( with ( tetralogy ( of Fallot ) ) ) ) ( ( have ( ( ( a ( blocked ( pulmonary artery ) ) ) , ) ( ( the vessel ) ( that ( ordinarily ( ( carries ( oxygen-depleted blood ) ) ( to ( the lungs ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Hearts)) (PP (IN with) (NP (NP (NN tetralogy)) (PP (IN of) (NP (NNP Fallot)))))) (VP (VBP have) (NP (NP (DT a) (VBN blocked) (JJ pulmonary) (NN artery)) (, ,) (NP (NP (DT the) (NN vessel)) (SBAR (WHNP (WDT that)) (S (ADVP (RB ordinarily)) (VP (VBZ carries) (NP (JJ oxygen-depleted) (NN blood)) (PP (TO to) (NP (DT the) (NNS lungs))))))))) (. .)))
Hearts with tetralogy of Fallot have a blocked pulmonary artery, the vessel that ordinarily carries oxygen-depleted blood to the lungs.
(ROOT (S (SBAR (IN After) (S (NP (NP (DT the) (NN blood)) (PP (IN in) (NP (DT the) (JJ pulmonary) (NNS capillaries)))) (VP (VBZ becomes) (VP (VBN saturated) (PP (IN with) (NP (NN oxygen))))))) (, ,) (NP (PRP it)) (VP (VBZ leaves) (NP (NP (DT the) (NNS lungs) (CC and) (NNS travels)) (PP (TO to) (NP (DT the) (NN heart))))) (. .)))