when was american sign language created, who created american sign language, how was american sign language created, when was sign language invented, when was sign language, american sign language invented, what is the history of sign language
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when was american sign language created
who created american sign language
how was american sign language created
when was sign language invented
when was sign language
american sign language invented
what is the history of sign language
when was american sign language created, who created american sign language, how was american sign language created, when was sign language invented, when was sign language, american sign language invented, what is the history of sign language
