Problem: Determine the topic of the question-answer pair. Question: "What Causes Brain Freeze?";  Answer: "It is caused by having something cold touch the roof of the mouth ( palate ), and is believed to result from a nerve response causing rapid constriction and swelling of blood vessels or a " referring " of pain from the roof of the mouth to the head."? Topic:

A: Ice-cream headache


Problem: Determine the topic of the question-answer pair. Question: "what is the population of algoma wi for 2010?";  Answer: "The population was 3,167 at the 2010 census ."? Topic:

A: Algoma, Wisconsin


Problem: Determine the topic of the question-answer pair. Question: "when us subprime mortgage market collapse?";  Answer: "The U.S. subprime mortgage crisis was a set of events and conditions that led to a financial crisis and subsequent recession that began in 2008."? Topic:

A: Subprime mortgage crisis


Problem: Determine the topic of the question-answer pair. Question: "what is adem disease?";  Answer: "Acute disseminated encephalomyelitis (ADEM) is an immune mediated disease of the brain ."? Topic:

A: