BTE no results on Workflow D.4 query

[vgardner-renci]

https://arax.ncats.io/?source=ARS&id=66cf5381-18cc-4756-8cd6-232500d7db8e

[vgardner-renci]

{
  "callback": "http://localhost:8000/ars/api/messages/56267c0d-d70c-4c67-8c7d-3259f7739a23",
  "message": {
    "query_graph": {
      "edges": {
        "e00": {
          "object": "n01",
          "subject": "n00"
        },
        "e01": {
          "object": "n02",
          "subject": "n01"
        },
        "e02": {
          "object": "n03",
          "subject": "n02"
        },
        "e03": {
          "object": "n04",
          "subject": "n03"
        }
      },
      "nodes": {
        "n00": {
          "categories": [
            "biolink:ChemicalSubstance"
          ],
          "ids": [
            "DRUGBANK:DB00150"
          ]
        },
        "n01": {
          "categories": [
            "biolink:Protein"
          ]
        },
        "n02": {
          "categories": [
            "biolink:MolecularActivity"
          ]
        },
        "n03": {
          "categories": [
            "biolink:MolecularActivity"
          ]
        },
        "n04": {
          "categories": [
            "biolink:ChemicalSubstance"
          ],
          "ids": [
            "KEGG.COMPOUND:C02700"
          ]
        }
      }
    }
  },
  "validation_result": {
    "message": "",
    "size": "2 kB",
    "status": "PASS",
    "version": "1.1.1"
  }
}```

[andrewsu]

Standard (linear) four-hop explain query. BTE planned fix tracked in biothings/biothings_explorer#112