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Yield Prolog Query Editor
Congratulations! Your browser has just loaded the full-featured Prolog environment in YieldProlog.js, complete with a Prolog parser and compiler.
Click one of the Samples or type some Prolog, then click Run to see the result. (Requires Firefox or Seamonkey.)

Query:

Samples: Hello world 2+2 assert uncle query uncle all Uncles (using setof) abolish uncle parse and call


Output: