请列出所有国家/地区的官方语言，以json格式返回
user
```json
{
    "countries": [
        {
            "country": "Afghanistan",
            "official_languages": ["Pashto", "Dari"]
        },
        {
            "country": "Albania",
            "official_languages": ["Albanian"]
        },
        {
            "country": "Algeria",
            "official_languages": ["Arabic"]
        },
        {
            "country": "Andorra",
            "official_languages": ["Catalan"]
        },
        {
            "country": "Angola",
            "official_languages": ["Portuguese"]
        },
        {
            "country": "Antigua and Barbuda",
            "official_languages": ["English"]
        },
        {
            "country": "Argentina",
            "official_languages": ["Spanish"]
        },
        {
            "country": "Armenia",
            "official_languages": ["Armenian"]
        },
        {
            "country": "Australia",
            "official_languages": ["English"]
        },
        {
            "country": "Austria",
            "official_languages": ["German"]
        },
        {
            "country": "Azerbaijan",
            "official_languages": ["Azerbaijani"]
        },
        {
            "country": "Bahamas",
            "official_languages": ["English"]
        },
        {
            "country": "Bahrain",
            "official_languages": ["Arabic"]
        },
        {
            "country": "Bangladesh",
            "official_languages": ["Bengali"]
        },
        {
            "country": "Barbados",
            "official_languages": ["English"]
        },
        {
            "country": "Belarus",
            "official_languages": ["Belarusian", "Russian"]
        },
        {
            "country": "Belgium",
            "official_languages": ["Dutch", "French", "German"]
        },
        {
            "country": "Belize",
            "official_languages": ["English"]
        },
        {
            "country": "Benin",
            "official_languages": ["French"]
        },
        {
            "country": "Bhutan",
            "official_languages": ["Dzongkha"]
        },
        {
            "country": "Bolivia",
            "official_languages": ["Spanish", "Quechua", "Aymara"]
        },
        {
            "country": "Bosnia and Herzegovina",
            "official_languages": ["Bosnian", "Croatian", "Serbian"]
        },
        {
            "country": "Botswana",
            "official_languages": ["English", "Tswana"]
        },
        {
            "country": "Brazil",
            "official_languages": ["Portuguese"]
        },
        {
            "country": "Brunei",
            "official_languages": ["Malay"]
        },
        {
            "country": "Bulgaria",
            "official_languages": ["Bulgarian"]
        },
        {
            "country": "Burkina Faso",
            "official_languages": ["French"]
        },
        {
            "country": "Burundi",
            "official_languages": ["French", "Kirundi"]
        },
        {
            "country": "Cambodia",
            "official_languages": ["Khmer"]
        },
        {
            "country": "Cameroon",
            "official_languages": ["French", "English"]
        },
        {
            "country": "Canada",
            "official_languages": ["English", "French"]
        },
        {
            "country": "Cape Verde",
            "official_languages": ["Portuguese"]
        },
        {
            "country": "Central African Republic",
            "official_languages": ["French", "Sango"]
        },
        {
            "country": "Chad",
            "official_languages": ["French", "Arabic"]
        },
        {
            "country": "Chile",
            "official_languages": ["Spanish"]
        },
        {
            "country": "China",
            "official_languages": ["Chinese"]
        },
        {
            "country": "Colomb
assistant