Two friends met on the street and one said, "I heard your brother died. What happened?"
"It was very sad," the other replied. "Lettuce killed him."
"How could lettuce kill a man?"
"He bought lettuce at the market and asked the store owner how to keep it fresh"
"The owner told him, 'Put your head in a plastic bag, tie it tight and put it in the refrigerator.'"
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