Assertion: opossum | /r/CapableOf | become stiff
Facets:
Source sentences:
text: During this time, the opossum lies on its side, becomes stiff, the eyes glaze over, the opossum drools, the tongue lolls out the side of the mouth, and green anal fluid may be seen.
text: Where these fail to work, they play dead by rolling over, become stiff, bare their teeth, and secrete a foul-smelling odor.
text: Their heart rate and breathing is reduced as they fall unconscious and become stiff.