"Nolan chart" meaning in English

{
  "etymology_text": "Created by American politician David Nolan in 1969.",
  "forms": [
    {
      "form": "Nolan charts",
      "tags": [
        "plural"
      ]
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      "args": {},
      "expansion": "Nolan chart (plural Nolan charts)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "A two-dimensional chart that graphs the political spectrum, mapping cultural issues on one axis and economic issues on another axis to represent conservatism, libertarianism, and their opposites."
      ],
      "id": "en-Nolan_chart-en-noun-5qQIdtRU",
      "links": [
        [
          "political",
          "political"
        ],
        [
          "spectrum",
          "spectrum"
        ],
        [
          "conservatism",
          "conservatism"
        ],
        [
          "libertarianism",
          "libertarianism"
        ]
      ],
      "related": [
        {
          "word": "Pournelle chart"
        },
        {
          "word": "Vosem chart"
        }
      ],
      "wikipedia": [
        "David Nolan (politician)"
      ]
    }
  ],
  "word": "Nolan chart"
}

{
  "etymology_text": "Created by American politician David Nolan in 1969.",
  "forms": [
    {
      "form": "Nolan charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Nolan chart (plural Nolan charts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Pournelle chart"
    },
    {
      "word": "Vosem chart"
    }
  ],
  "senses": [
    {
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      ],
      "glosses": [
        "A two-dimensional chart that graphs the political spectrum, mapping cultural issues on one axis and economic issues on another axis to represent conservatism, libertarianism, and their opposites."
      ],
      "links": [
        [
          "political",
          "political"
        ],
        [
          "spectrum",
          "spectrum"
        ],
        [
          "conservatism",
          "conservatism"
        ],
        [
          "libertarianism",
          "libertarianism"
        ]
      ],
      "wikipedia": [
        "David Nolan (politician)"
      ]
    }
  ],
  "word": "Nolan chart"
}