Assertion: fox | /r/CapableOf | migrate to north america
Facets:
value: during the illinoian glaciation
type: TEMPORAL
Source sentences:
text: Phylogeographical and genetic analysis of the North American red fox suggests that foxes first migrated to North America during the Illinoian glaciation (300,000 to 130,000 years before present) and spread southward (Aubry et al., 2009)