Question: When was the last time chiefs won a superbowl?
Disambiguated questions and answers: question: What date was the last time chiefs won a superbowl?
What super bowl was the last time chiefs won a superbowl?
answer: February 2, 2020
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Super Bowl LIV
question: When date was the last time chiefs won a superbowl in 1970?
When edition was the last time chiefs won a superbowl in 1970?
answer: January 11, 1970
Super Bowl IV
Natural Questions answer: January 11 , 1970 (from the Wikipedia article "Kansas City Chiefs")