{
    "name": "Continual Relation Extraction",
    "children": [
     {
      "name": "Continual Learning",
      "children": [
       {"name": "Continual Learning"},
       {"name": "Lifelong Learning"},
       {"name": "Incremental Learning"},
       {"name": "Continuous Learning"},
       {"name": "Online Learning"}
      ]
     },
     {
         "name": "Relation Extraction",
         "children": [
          {"name": "Relation Extraction"},
          {"name": "Relation Discovery"},
          {"name": "Relationship Extraction"},
          {"name": "Relation Detection"},
          {"name": "Dynamic Relation Extraction"}
         ]
        }

    ]
}