Assertion: goose's feather | /r/HasProperty | collected
Facets:
value: -invasively
type: MANNER
Source sentences:
text: Because a bird can eliminate heavy metals in its feathers and because feathers can be collected non-invasively and stored indefinitely, down feathers can be used to check for evidence of metal contamination in the bird's environment.
text: Geese are usually not fed the day before their feathers are collected, to avoid them contaminating their feathers with droppings.