Assertion: blackjack oak | /r/HasProperty | tree
Facets:
Source sentences:
text: Among the smaller oak trees that grow there are the blackjack oak, a tree with an average height between 20 and 30 feet, and the sawtooth oak, which rarely exceeds 45 feet.
text: The blackjack oak, Quercus marilandica, is a tree in the red oak grouping of oaks.