"'45" meaning in English

{
  "forms": [
    {
      "form": "the '45",
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    {
      "args": {
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      "expansion": "the '45",
      "name": "en-proper noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Forty-five"
        }
      ],
      "categories": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "name": "Pages with 1 entry",
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      ],
      "glosses": [
        "Alternative form of Forty-five"
      ],
      "id": "en-'45-en-name-zuNlS5dv",
      "links": [
        [
          "Forty-five",
          "Forty-five#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "'45"
}

{
  "forms": [
    {
      "form": "the '45",
      "tags": [
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    }
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        "def": "1"
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      "expansion": "the '45",
      "name": "en-proper noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Forty-five"
        }
      ],
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        "English terms spelled with numbers",
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      ],
      "glosses": [
        "Alternative form of Forty-five"
      ],
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        [
          "Forty-five",
          "Forty-five#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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  ],
  "word": "'45"
}