Assertion: lemming's migration | /r/CapableOf | take place
Facets:
value: at the peak of boom years
type: TEMPORAL
value: as animals
type: MANNER
value: to search for food
type: PURPOSE
Source sentences:
text: Cycles tend to follow a three to five year cycle and, at the peak of boom years, mass migration may take place as animals scatter to search for food that may have become locally scarce due to ever burgeoning numbers of lemmings.