Assertion: fox's family | /r/CapableOf | subdivide into three subfamilies
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Source sentences:
text: The canid family soon subdivided into three subfamilies, each of which diverged during the Eocene: Hesperocyoninae (about 39.74–15 Mya), Borophaginae (about 34–2 Mya), and Caninae (about 34–0 Mya).