Assertion: secretariat's heart | /r/HasProperty | trait
Facets:
Source sentences:
text: An extremely large heart is a trait that occasionally occurs in Thoroughbreds, hypothesized to be linked to a genetic condition, called the "x-factor", passed down in specific inheritance patterns.
text: An extremely large heart is a trait that occasionally occurs in Thoroughbreds, linked to a genetic condition passed down via the dam line, known as the "x-factor".The x-factor can be traced to the historic racehorse Eclipse, which was necropsied after his death in 1789.