LinkedEntity

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "LinkedEntity",
  "description": "EntityMentions can be linked to multiple entities using a LinkedEntity message lets us add other fields, e.g. confidence.",
  "properties": {
    "entityId": {
      "description": "entity_id is a concept unique identifier. These are prefixed by a string that identifies the entity coding system, followed by the unique identifier within that system. For example, \"UMLS/C0000970\". This also supports ad hoc entities, which are formed by normalizing entity mention content.",
      "type": "string"
    }
  },
  "type": "object"
}