Assertion: sign language's history | /r/CapableOf | start in 17th century
Facets:
value: as method
type: MANNER
value: although references to forms of communication
type: OTHER
Source sentences:
text: The recorded history of sign language in Western societies starts in the 17th century, as a visual language or method of communication, although references to forms of communication using hand gestures date back as far as 5th century BC Greece.