Once upon a time, someone pressed a bunch of grapes to extract the juice, put the liquid in a jar, covered it with cloth to keep the flies out and placed the jar in a cool place to keep the contents fresh.Upon his return, he found the juice had changed – it was slightly fizzy and tasted very different from the fresh juice. Not knowing what to do, he left the contents in the jar untouched. Out of curiosity, he went back to the jar periodically to taste what was happening and after a while...
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