A WolframAlpha query is a request sent to the answer engine WolframAlpha. WolframAlpha computes answers and relevant visualizations from a knowledge base of curated, structured data that come from other sites and books. It is able to respond to particularly phrased natural language fact-based questions. Normally users submit queries and computation requests via a text field but it is also possible to programmatically query various Wolfram|Alpha APIs.
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