Assertion: groove | /r/CapableOf | extend down the tooth
Facets:
value: at age
type: TEMPORAL
value: each year
type: TEMPORAL
Source sentences:
text: Each year, the groove will extend a little farther down the tooth.
text: Since a Galvayne's groove is expected to first be visible at the top of the tooth around age 10, and to extend about halfway down the tooth at age 15, this horse's groove is representing his age accurately.