Assertion: aspen's problem | /r/HasProperty | severe
Facets:
value: last year
type: TEMPORAL
Source sentences:
text: If the problem was severe last year you may want to consider spraying the trees in March with a dormant oil.
text: If the problem is severe, the caterpillar weakens and kills trees.
text: If the problem is severe, the caterpillar weakens and kills trees.
text: When the problem is severe, foliage drops from the tree.