Assertion: phalanx's base | /r/HasProperty | the first
Facets:
value: among the bases
type: LOCATION
value: among proximal extremities
type: OTHER
Source sentences:
text: Among the bases or proximal extremities, the base of the proximal row is the first to begin ossifying between 3 and 4 years of age, with those for the middle and distal rows following a year later.