{
  "id": "path_beginner_001",
  "title": "German Greetings - Erste Begrüßungen",
  "description": "Learn basic German greetings and polite expressions. Your first steps into the German language!",
  "metadata": [
    {
      "path_id": "path_beginner_001",
      "version": "1.0.0",
      "created_at": "2024-01-10T09:00:00Z",
      "updated_at": "2024-01-10T09:00:00Z"
    }
  ],
  "nodes": [
    {
      "id": 1,
      "title": "Hello & Goodbye - Hallo & Tschüss",
      "description": "Learn the most common ways to say hello and goodbye in German.",
      "path_id": "path_beginner_001",
      "exercises": [
        {
          "id": 101,
          "ex_type": "vocabulary",
          "content": "{\"word\": \"Hallo\", \"translation\": \"Hello\", \"audio\": \"/audio/hallo.mp3\", \"example\": \"Hallo, wie geht's?\"}",
          "node_id": 1
        },
        {
          "id": 102,
          "ex_type": "vocabulary",
          "content": "{\"word\": \"Tschüss\", \"translation\": \"Bye\", \"audio\": \"/audio/tschuess.mp3\", \"example\": \"Tschüss, bis bald!\"}",
          "node_id": 1
        },
        {
          "id": 103,
          "ex_type": "multiple_choice",
          "content": "{\"question\": \"How do you say 'Hello' in German?\", \"options\": [\"Hallo\", \"Danke\", \"Bitte\", \"Tschüss\"], \"correct\": 0, \"explanation\": \"'Hallo' is the most common way to say hello in German.\"}",
          "node_id": 1
        }
      ]
    },
    {
      "id": 2,
      "title": "Please & Thank You - Bitte & Danke",
      "description": "Master the magic words of politeness in German.",
      "path_id": "path_beginner_001",
      "exercises": [
        {
          "id": 201,
          "ex_type": "vocabulary",
          "content": "{\"word\": \"Danke\", \"translation\": \"Thank you\", \"audio\": \"/audio/danke.mp3\", \"example\": \"Danke schön!\"}",
          "node_id": 2
        },
        {
          "id": 202,
          "ex_type": "vocabulary",
          "content": "{\"word\": \"Bitte\", \"translation\": \"Please/You're welcome\", \"audio\": \"/audio/bitte.mp3\", \"example\": \"Bitte schön!\"}",
          "node_id": 2
        },
        {
          "id": 203,
          "ex_type": "conversation",
          "content": "{\"scenario\": \"Simple polite exchange\", \"dialogue\": [{\"speaker\": \"A\", \"text\": \"Danke!\"}, {\"speaker\": \"B\", \"text\": \"Bitte schön!\"}], \"vocabulary_focus\": [\"Danke\", \"Bitte\"]}",
          "node_id": 2
        }
      ]
    }
  ]
}