"Marianergraven" meaning in Swedish

{
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    {
      "args": {
        "1": "sv",
        "2": "Marianerna",
        "3": "grav"
      },
      "expansion": "Marianerna + grav",
      "name": "compound"
    }
  ],
  "etymology_text": "Marianerna + grav",
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "proper noun"
      },
      "expansion": "Marianergraven",
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  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Swedish entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "name": "Swedish entries with topic categories using raw markup",
          "parents": [
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          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "sv",
          "name": "Oceans",
          "orig": "sv:Oceans",
          "parents": [
            "Seas",
            "Bodies of water",
            "Places",
            "Landforms",
            "Water",
            "Names",
            "Earth",
            "Liquids",
            "All topics",
            "Proper nouns",
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            "Matter",
            "Fundamental",
            "Nouns",
            "Chemistry",
            "Lemmas",
            "Sciences"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the Mariana Trench in the Pacific Ocean"
      ],
      "id": "en-Marianergraven-sv-name-qW8OvD67",
      "links": [
        [
          "Mariana Trench",
          "Mariana Trench"
        ]
      ],
      "wikipedia": [
        "sv:Marianergraven"
      ]
    }
  ],
  "word": "Marianergraven"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sv",
        "2": "Marianerna",
        "3": "grav"
      },
      "expansion": "Marianerna + grav",
      "name": "compound"
    }
  ],
  "etymology_text": "Marianerna + grav",
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "proper noun"
      },
      "expansion": "Marianergraven",
      "name": "head"
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  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "name",
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        "Swedish entries with incorrect language header",
        "Swedish entries with topic categories using raw markup",
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      ],
      "glosses": [
        "the Mariana Trench in the Pacific Ocean"
      ],
      "links": [
        [
          "Mariana Trench",
          "Mariana Trench"
        ]
      ],
      "wikipedia": [
        "sv:Marianergraven"
      ]
    }
  ],
  "word": "Marianergraven"
}