Assertion: canker sore's border | /r/HasProperty | red
Facets:
Source sentences:
text: Canker sores are shaped like a circle or oval, are yellow or white in color, and have a red border.
text: Canker sores are white, gray or yellow in color and are marked by red border.
text: They are small in appearance, round or oval, and have a white or yellow center and a red border.