Assertion: lemming's population | /r/CapableOf | increase to the point
Facets:
Source sentences:
text: Every three to four years, the population of lemmings increases to the point where Norway lemmings feel the need to migrate in a desperate search for food sources.
text: Every three to four years, the population of lemmings increases to the point where they feel the need to migrate in a desperate search for food sources.