Do you ever wonder how Google, Yahoo, or Bing can give you a direct answer to your question? Answers to questions like “How tall is the Eiffel Tower?” or “How old is Donald Trump?” what kind of magic is this? How can Google answer that? AI? A person writing all the answers?

The answer is easy (not really): Knowledge graph, a way to relate and store a lot of information, that gives the system the ability to store data and convert it to information without a human pre-processing the data.