Assertion: mitral valve's leaflet | /r/HasAspect | segment
Facets:
Source sentences:
text: The posterior leaflet is divided into three distinct anatomic scallops or segments: the anterolateral, middle, and posteromedial.
text: The posterior leaflet is divided into 3 scallops or segments (lateral, middle, and medial scallops) identified as P1, P2, and P3.