Assertion: walrus's food | /r/CapableOf | become scarce
Facets:
Source sentences:
text: Many animals (like the Arctic tern) spend the summer months in the Arctic, but leave as the weather turns frigid and food becomes scarce (these animals return again the next summer, repeating this pattern year after year).
text: Their natural habitat is just below the treelines of mountain scapes, although they will descend further into the forests if food becomes scarce enough.