#query: any glycan AND bi-sected motif AND has Lewis X motif OR #Lewis Y motif. 
#problem: produces an error


[
  {
    "concept": "motif",
    "query": {
      "aggregator": "$and",
      "unaggregated_list": [
        {
          "order": 1,
          "path": "names.name",
          "operator": "$regex",
          "string_value": "bisected"
        }
      ],
      "aggregated_list": [
        {
          "aggregator": "$or",
          "unaggregated_list": [
            {
              "order": 1,
              "path": "names.name",
              "operator": "$regex",
              "string_value": "lewis x"
            },
            {
              "order": 2,
              "path": "names.name",
              "operator": "$regex",
              "string_value": "lewis y"
            }
          ],
          "aggregated_list": []
        }
      ]
    }
  }
]