Assertion: bur oak | /r/HasProperty | weakened by wood-rot fungi
Facets:
value: in the lower branches
type: LOCATION
Source sentences:
text: Older bur oaks may survive in dense woodlands for 80 years, until they are weakened by wood-rot fungi in the lower branches killed by shade, and by 100 to 110 years, they are often snapped by wind storms.