{
  "educational_attainment": "Unknown",
  "prior_occupation": "Unknown",
  "class_background": "Unknown",
  "birth_year": 1974,
  "birth_place": "Unknown",
  "disability_status": "Unknown",
  "sexual_orientation": "Unknown",
  "sources": {
    "educational_attainment": "Unknown",
    "prior_occupation": "Unknown",
    "birth_year": "Unknown",
    "birth_place": "Unknown",
    "disability_status": "Unknown",
    "sexual_orientation": "Unknown"
  }
}