[
    {
        "category": "society",
        "threads": []
    },
    {
        "category": "economy",
        "threads": []
    },
    {
        "category": "technology",
        "threads": []
    },
    {
        "category": "sports",
        "threads": []
    },
    {
        "category": "entertainment",
        "threads": []
    },
    {
        "category": "science",
        "threads": []
    },
    {
        "category": "other",
        "threads": []
    },
    {
        "category": "any",
        "threads": []
    }
]