{
  "fields": [{"type":"int","id":"_id"},{"type":"numeric","id":"anno"},{"type":"numeric","id":"eta media"}],
  "records": [
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    [2,2015,49.44],
    [3,2016,49.86],
    [4,2017,50.17],
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    [7,2020,50.22],
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    [11,2024,51.14]
]}