"hard class" meaning in English

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  "head_templates": [
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        "1": "-"
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      "expansion": "hard class (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "kind": "other",
          "name": "English entries with incorrect language header",
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          "kind": "topical",
          "langcode": "en",
          "name": "Travel",
          "orig": "en:Travel",
          "parents": [
            "Human activity",
            "Transport",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
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          "source": "w"
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      "examples": [
        {
          "ref": "1962 December, “Beyond the channel: U.S.S.R.: Train speeds still rising”, in Modern Railways, page 418",
          "text": "One main line only can show any mile-a-minute running, and that is the straight and reasonably level 404 miles between Moscow and Leningrad. There are two diesel-hauled expresses in each direction daily—rather oddly carrying \"hard class\" passengers only—which cover the distance in 6hr 20min [...].",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
      "id": "en-hard_class-en-noun-C6dZOdRX",
      "links": [
        [
          "travel",
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      ],
      "raw_glosses": [
        "(travel, informal) A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
      "tags": [
        "informal",
        "uncountable"
      ],
      "topics": [
        "lifestyle",
        "tourism",
        "transport",
        "travel"
      ]
    }
  ],
  "word": "hard class"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
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      "expansion": "hard class (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English entries with incorrect language header",
        "English informal terms",
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        "en:Travel"
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      "examples": [
        {
          "ref": "1962 December, “Beyond the channel: U.S.S.R.: Train speeds still rising”, in Modern Railways, page 418",
          "text": "One main line only can show any mile-a-minute running, and that is the straight and reasonably level 404 miles between Moscow and Leningrad. There are two diesel-hauled expresses in each direction daily—rather oddly carrying \"hard class\" passengers only—which cover the distance in 6hr 20min [...].",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
      "links": [
        [
          "travel",
          "travel"
        ]
      ],
      "raw_glosses": [
        "(travel, informal) A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
      "tags": [
        "informal",
        "uncountable"
      ],
      "topics": [
        "lifestyle",
        "tourism",
        "transport",
        "travel"
      ]
    }
  ],
  "word": "hard class"
}