"coal blacks" meaning in All languages combined

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "form_of": [
        {
          "word": "coal black"
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        "plural of coal black"
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      "id": "en-coal_blacks-en-noun-~cv9-UuW",
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  "word": "coal blacks"
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  "lang_code": "en",
  "pos": "noun",
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  "word": "coal blacks"
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