Question: When was the last time the bombers won a grey cup?
Disambiguated questions and answers: question: When was the last time the bombers won a grey cup at BC Place?
When was the last time the bombers won a grey cup at Landsdowne Park?
When was the last time the bombers won a grey cup at Commonwealth Stadium?
answer: November 25, 1990
November 27, 1988
November 18, 1984
Natural Questions answer: 1990 (from the Wikipedia article "Winnipeg Blue Bombers")