Assertion: jimmy's problem | /r/HasProperty | artery
Facets:
value: in billy's case
type: TEMPORAL
Source sentences:
text: Children with TOF have all four cardiac defects in varying degrees but in Billy's case, the two most serious problems are a completely obstructed pulmonary valve or artery (atresia) and a hole between his left and right ventricles (ventricular septal defect).