Assertion: indian sign language | /r/HasProperty | the lingua franca
Facets:
value: across is now central canada
type: LOCATION
Source sentences:
text: Plains Indian Sign Language (PISL), also known as Plains Sign Talk, Plains Sign Language and First Nation Sign Language, is a trade language, formerly trade pidgin, that was once the lingua franca across what is now central Canada, the central and western United States and northern Mexico, used among the various Plains Nations.