Assertion: wilderness's acre | /r/HasProperty | impacted by douglas fir beetle
Facets:
Source sentences:
text: A survey of the forest performed in 2010 indicated that over 1,000,000 acres (400,000 ha) of timberland had been impacted by insects such as the mountain pine beetle, spruce bark beetle and Douglas fir beetle, and that the insects had killed between 25 and 100 percent of the trees in the impacted areas.