Assertion: beaver's toe | /r/HasProperty | preening
Facets:
Source sentences:
text: They use the preening toe as a comb to prevent their fine, soft fur from matting to maintain its waterproofing and insulating properties.
text: Their hind feet also possess a special toe called a preening toe that has a double toenail and allows beavers to comb and keep their fur in prime condition.