Assertion: wasp | /r/HasProperty | useful
Facets:
value: to the ecology
type: TRANSITIVE-OBJECT
Source sentences:
text: As soon as I explain to people that wasps are useful, they immediately go, 'Oh, O.K., I won't squash them the next time I see one.'
text: Wasps are useful to the ecology as they help in controlling the population of many pests.