{
  "question_id": 5109,
  "hints": [
    {
      "hint_level": 1,
      "hint": "Paul is v years old."
    },
    {
      "hint_level": 2,
      "hint": "Sister is 4 years older."
    },
    {
      "hint_level": 3,
      "hint": "Sister = v + 4."
    }
  ]
}