"Martha's Vineyard Sign Language" meaning in English

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          "ref": "2020 April 27, Meg Medina, “A Deaf Girl Finds Her Voice on Martha's Vineyard in the 19th Century”, in The New York Times Book Review, New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 05 Dec 2022:",
          "text": "LeZotte also gives readers a sense of M.V.S.L. (Martha's Vineyard Sign Language), used by the islanders through the mid-1900s but never fully documented, by combining \"home signs\" she used as a child with variations of American Sign Language.",
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  "word": "Martha's Vineyard Sign Language"
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          "text": "LeZotte also gives readers a sense of M.V.S.L. (Martha's Vineyard Sign Language), used by the islanders through the mid-1900s but never fully documented, by combining \"home signs\" she used as a child with variations of American Sign Language.",
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