Google's Knowledge Graph cards include a lot of information from Wikipedia. Google usually shows a snippet from a Wikipedia article and links to the article. I was surprised to notice that cards for countries and big cities from all over the world no longer quote Wikipedia and now include detailed information from travel guides.
Here's an example for [France]: "France, in Western Europe, encompasses medieval and port cities, tranquil villages, mountains and Mediterranean beaches. Paris, its capital, is known worldwide for its couture fashion houses, classical art museums including the Louvre and monuments like the Eiffel Tower. The country is also renowned for its sophisticated cuisine and its wines. Lascaux's ancient cave drawings, Lyon's Roman theater and the immense Palace of Versailles are testaments to its long history."
The snippet from the corresponding Wikipedia article is less poetic: "France, officially the French Republic, is a sovereign state comprising territory in western Europe and several overseas regions and territories. The European part of France, called Metropolitan France, extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. France spans 640,679 square kilometres (247,368 sq mi) and has a total population of 67 million. It is a unitary semi-presidential republic with the capital in Paris, the country's largest city and main cultural and commercial centre."
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