"hard class" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "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 [...].",
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      "glosses": [
        "A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
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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"
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      "topics": [
        "lifestyle",
        "tourism",
        "transport",
        "travel"
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  "word": "hard class"
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  "lang_code": "en",
  "pos": "noun",
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          "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 [...].",
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      ],
      "glosses": [
        "A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
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        [
          "travel",
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        "(travel, informal) A class of accommodation, typically on trains, which is less comfortable than other classes, and might have wooden seating."
      ],
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        "lifestyle",
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  "word": "hard class"
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