Assertion: sign language | /r/HasProperty | natural languages
Facets:
value: with lexicon
type: OTHER
value: with their own grammar
type: OTHER
Source sentences:
text: Most sign languages are natural languages, different in construction from oral languages used in proximity to them, and are employed mainly by deaf people in order to communicate.
text: Sign languages are full-fledged natural languages with their own grammar and lexicon.