[Q]: What is the question to: "Radioluminescence , production of luminescence in a material by the bombardment of ionizing radiation"? The topic is Glow-in-the-dark.
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[A]: "what glows in the dark?"

[Q]: What is the question to: "An invoice or bill is a commercial document issued by a seller to a buyer , indicating the products , quantities, and agreed prices for products or services the seller has provided the buyer."? The topic is Invoice.
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[A]: "what is the use of a sales invoice??"

[Q]: What is the question to: "Defibrillation is a common treatment for life-threatening cardiac dysrhythmias , ventricular fibrillation , and pulseless ventricular tachycardia ."? The topic is Defibrillation.
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[A]: "when can you use a defibulator?"

[Q]: What is the question to: "Bernard Lawrence "Bernie" Madoff (; born April 29, 1938) is an American former stockbroker , investment advisor , financier , and white collar criminal ."? The topic is Bernard Madoff.
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[A]:
"what was bernie madoff selling?"