Assertion: white cane | /r/HasProperty | introduced
Facets:
value: properly
type: MANNER
Source sentences:
text: Blind people have used canes as mobility tools for centuries, but it was not until after World War I that the white cane was introduced.
text: Blind and visually impaired people have used canes as mobility tools for centuries, but it was not until after World War I that the white cane was properly introduced.