// todo need optimize like in event.jsp. Add indexing or not indexing this page. Sign language and its alphabet are standardized to what they are today, where every word in English could be said in sign language (15 jun 1720 ano – 15 jun 2018 ano) (Linha do tempo)
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Sign language and its alphabet are standardized to what they are today, where every word in English could be said in sign language (15 jun 1720 ano – 15 jun 2018 ano)

Adicionado na linha do tempo:

The Evolution of Sign Language

ByDavid Heineman
5 nov 2017

Data:

15 jun 1720 ano
15 jun 2018 ano
~ 298 years
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