Assertion: oak | /r/CapableOf | develop an on-and-off mast cycle
Facets:
value: to ensure their reproductive survival
type: PURPOSE
value: over the eons
type: TEMPORAL
Source sentences:
text: Many scientists now believe the mast cycle is an evolutionary adaptation; that over the eons oaks and other nut-bearing trees have developed an on-and-off mast cycle to ensure their reproductive survival.