Assertion: isolation | /r/CapableOf | involve providing enough distance
Facets:
value: between any sources of contaminating pollen
type: TRANSITIVE-OBJECT
value: between a variety
type: TRANSITIVE-OBJECT
Source sentences:
text: Isolation by distance is the most reliable method, which involves providing enough distance between a variety and any sources of contaminating pollen to ensure that the variety remains true to type.