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The McDonald's McRib sandwich has returned for a limited time in select cities across the U.S.

Made from a boneless pork patty, the McRib contains 520 calories.

The McRib was invented in 1981 and has been periodically brought back since its first "farewell tour" in 2005.

It's that season again, the magical time for children and adults alike as they look forward to the happiest day of the year,

The McRib is back .

Not everywhere, but the world's most beloved mystery meat has emerged at select restaurants in different regional areas, "hitting cities like Miami, Dallas, Cleveland, St. Louis, Atlanta, Chicago, Seattle, Los Angeles and more," according to a Nov. 11 release from McDonalds.

The iconic sandwich began popping up in some markets last week, according to si

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