{
  "term": "Actinium",
  "role": "concept",
  "parent_concepts": [
    "Actinides"
  ],
  "layer": 4,
  "domain": "PhysicalWorld",
  "definition": "a radioactive element of the actinide series; found in uranium ores",
  "definition_source": "SUMO",
  "aliases": [
    "actinium",
    "Ac",
    "atomic_number_89"
  ],
  "wordnet": {
    "synsets": [
      "14627655.n"
    ],
    "canonical_synset": "14627655.n",
    "lemmas": [
      "actinium",
      "Ac",
      "atomic_number_89"
    ],
    "pos": "n"
  },
  "relationships": {
    "related": [],
    "antonyms": [],
    "has_part": [],
    "part_of": []
  },
  "safety_tags": {
    "risk_level": "low",
    "impacts": [],
    "treaty_relevant": false,
    "harness_relevant": false
  },
  "training_hints": {
    "positive_examples": [],
    "negative_examples": [],
    "disambiguation": "",
    "seed_terms": [
      "actinium",
      "Ac",
      "atomic_number_89"
    ]
  },
  "is_category_lens": true,
  "child_count": 0
}