{
  "type": "deleteinsert",
  "delete": [
    {
      "type": "pattern",
      "termType": "Quad",
      "subject": {
        "termType": "Variable",
        "value": "s"
      },
      "predicate": {
        "termType": "Variable",
        "value": "p"
      },
      "object": {
        "termType": "Variable",
        "value": "o"
      },
      "graph": {
        "termType": "NamedNode",
        "value": "http://example.org/g1"
      }
    }
  ],
  "where": {
    "type": "bgp",
    "patterns": [
      {
        "type": "pattern",
        "termType": "Quad",
        "subject": {
          "termType": "NamedNode",
          "value": "http://example.org/a"
        },
        "predicate": {
          "termType": "NamedNode",
          "value": "http://xmlns.com/foaf/0.1/knows"
        },
        "object": {
          "termType": "Variable",
          "value": "s"
        },
        "graph": {
          "termType": "NamedNode",
          "value": "http://example.org/g1"
        }
      },
      {
        "type": "pattern",
        "termType": "Quad",
        "subject": {
          "termType": "Variable",
          "value": "s"
        },
        "predicate": {
          "termType": "Variable",
          "value": "p"
        },
        "object": {
          "termType": "Variable",
          "value": "o"
        },
        "graph": {
          "termType": "NamedNode",
          "value": "http://example.org/g1"
        }
      }
    ]
  }
}