{
  "wasGeneratedBy": {
    "ex:gen3": {
      "prov:activity": "ex:a1",
      "prov:role": [
        {
          "$": "somerole",
          "type": "xsd:string"
        },
        {
          "$": "otherRole",
          "type": "xsd:string"
        }
      ],
      "prov:entity": "ex:e1"
    }
  },
  "prefix": {
    "ex": "http://example.org/"
  }
}