The CIA World Factbook contains data for 260+ countries. The data is in the public domain.
You can ask for country facts and lists:
What is the population of Chile?
Where is Mozambique?
How large is Turkey?
How many phones are in Albania?
What languages are spoken in Spain?
What are the major cities in Italy?
What countries border Serbia?
What are Mongolia's resources?
What are the agricultural products of New Zealand?
What are the industries of Germany?
You can ask for briefs:
Tell me about Canada
Brief me on the economy of Fiji
You can ask about leading countries in a category:
What country is the largest?
Which countries have the highest exports?
Which countries have the most Internet users?
What country has the lowest population?
You can listen to national anthems:
Play the national anthem of Australia
These country & region names are recognized:
Afghanistan, Akrotiri, Albania, Algeria, American, Samoa, Andorra, Angola, Anguilla, Antarctica, Antigua and Barbuda, Arctic Ocean, Argentina, Armenia, Aruba, Ashmore and Cartier Islands, Atlantic Ocean, Australia, Austria, Azerbaijan, The Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Bouvet Island, Brazil, British, Indian Ocean Territory, British Virgin Islands, Brunei, Bulgaria, Burkina Faso, Burma, Burundi, Cabo Verde, Cambodia, Cameroon, Canada, Cayman, Islands, Central African Republic, Chad, Chile, China, Christmas Island, Cocos (Keeling) Islands, Colombia, Comoros, Democratic Republic of The Congo, Republic of The Congo, Cook Islands, Coral Sea Islands, Costa Rica, Cote D'Ivoire, Croatia, Cuba, Curacao, Cyprus, Czechia, Denmark, Dhekelia, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Eswatini, Ethiopia, European, Union, Falkland,Islands (Islas, Malvinas), Faroe Islands, Fiji, Finland, France, French, Polynesia, Gabon, The Gambia, Gaza Strip, Georgia, Germany, Ghana, Gibraltar, Greece, Greenland, Grenada, Guam, Guatemala, Guernsey, Guinea, Guinea-Bissau, Guyana, Haiti, Heard Island and McDonald Islands, Holy See (Vatican, City), Honduras, Hong, Kong, Hungary, Iceland, India, Indian, Ocean, Indonesia, Iran, Iraq, Ireland, Isle Of Man, Israel, Italy, Jamaica, Jan Mayen, Japan, Jersey, Jordan, Kazakhstan, Kenya, Kiribati, North Korea, South Korea, Kosovo, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Macau, Macedonia, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall, Islands, Mauritania, Mauritius, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Namibia, Nauru, Navassa Island, Nepal, Netherlands, New Caledonia, New Zealand, Nicaragua, Niger, Nigeria, Niue, Norfolk Island, Northern, Mariana, Islands, Norway, Oman, Pacific, Ocean, Pakistan, Palau, Panama, Papua New Guinea, Paracel Islands, Paraguay, Peru, Philippines, Pitcairn Islands, Poland, Portugal, Puerto, Rico, Qatar, Romania, Russia, Rwanda, Saint, Barthelemy, Saint, Helena,, Ascension,, And, Tristan, Da, Cunha, Saint, Kitts, And, Nevis, Saint, Lucia, Saint, Martin, Saint, Pierre, And, Miquelon, Saint, Vincent, And, The, Grenadines, Samoa, San Marino, Sao Tom and Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Sint Maarten, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Georgia and South Sandwich Islands, South Sudan, Southern Ocean, Spain, Spratly Islands, Sri Lanka, Sudan, Suriname, Svalbard, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Thailand, Timor-Leste, Togo, Tokelau, Tonga, Trinidad, and Tobago, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Tuvalu, Uganda, Ukraine, United, Arab, Emirates, United Kingdom, United States, Uruguay, Uzbekistan, Vanuatu, Venezuela, Vietnam, Virgin Islands, Wake Island, Wallis and Futuna, West Bank, Western, Sahara, World, Yemen, Zambia, Zimbabwe
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