Assertion: bur oak | /r/HasProperty | a fairly low-maintenance tree
Facets:
Source sentences:
text: Bur oak is a fairly low-maintenance tree that grows in U.S. Department of Agriculture plant hardiness zones 3 to 8.
text: Culture Bur oak is a fairly low-maintenance tree that grows in U.S. Department of Agriculture plant hardiness zones 3 to 8.