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  "data": {
    "url": "https://datagraphics.dc.scilifelab.se/api/dataset/6d2f88f8f95a464980be190a2bddd8e7.csv"
  },
  "width": 450,
  "height": 150,
  "mark": {
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  "encoding": {
    "x": {
      "title": "Week",
      "field": "week",
      "type": "nominal",
      "axis": {
        "labelAngle": 90
      }
    },
    "y": {
      "title": "% relative to value Nov 6th 2020",
      "field": "relative_concentration",
      "type": "quantitative",
      "axis": {
        "orient": "right"
      }
    },
    "color": {
      "field": "facility",
      "type": "nominal",
      "scale": {
        "range": [
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      },
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    },
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        "field": "week",
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        "title": "Week"
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        "field": "facility",
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        "title": "Wastewater treatment facility"
      },
      {
        "field": "relative_concentration",
        "type": "quantitative",
        "title": "SARS CoV-2 % relative to value Nov 6th 2020"
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}