People:
  - Alice
  - Bob
Categories:
  ReverseEngineering:
    Assignee:
      - Alice
    Verifier:
      - Bob
    Challenges:
      - Foo_Easy
      - Bar_Medium
  Forensics:
    Assignee:
      - Bob
    Verifier:
      - Alice
    Challenges:
      - Baz_Medium
      - Other_Baz_Hard