Assertion: birch's bark | /r/ObjectUse | used as covering
Facets:
value: in the making of canoes
type: TEMPORAL
Source sentences:
text: Bark of bhoj patra is used as a covering, protecting from evil effects of devils etc.
text: Some barks can be removed in long sheets; the smooth surfaced bark of birch trees has been used as a covering in the making of canoes, as the drainage layer in roofs, for shoes, backpacks etc.