{
  "$schema": "https://json-structure.org/draft/2020-12/schema",
  "name": "Person",
  "type": "object",
  "properties": {
    "name": { "type": "string" },
    "birth_year": { "type": ["integer", "null"] },
    "death_year": { "type": ["integer", "null"] }
  }
}