[Q]: Two friends had unprotected sex with their respective dates on the same night. Everything went fine for both of them. They later found out the bad news. Mike had been infected with HIV. Luckily enough Pete was healthy, he didn't get any diseases. Which friend had a virus that is transmitted by contact with infected breast milk?
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[A]: Mike
input: Please answer the following: Local hospital has launched a program to check if a patient has Retinitis. Resident ophthalmologist David is in charge of this program. In the first day of the program he checked two patients, patient A and patient B. The test result showed that patient A had Retinitis, but patient B did not have Retinitis. Then next day David checked two other patients, patient C and patient D. Patient C was 40 years old, but patient D was 80 years old. He found both patient C and D had Retinitis. Which patient would have inflammation of retina, patient A or patient B?
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output: patient A
Please answer this: Planet Earth and planet Mars both had breathable atmospheres and were inhabited by humans. People of Earth destroyed the ozone layer, people of mars were more careful and protected it. Which planet had fewer people using aerosol sprays?
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Answer: Mars
Problem: Finland has one of the lowest economic inequality in the world. Finland's neighbor Russia has a different story. After the collapse of Soviet Union, Russia's economic inequality soared to the point that it has now one of the highest economic inequality in the world. John and Keith are residents of Finland. While John is rich, Keith is not so fortunate - he is poor. Similarly, David and Greg are residents of Russia. While David is rich, Greg is in poverty. Who would have smaller marginal utility, John or Keith?

A: John
Problem: Given the question: Two farmers had different pests attacking their plants. John had a big aphid problem, so he used all the methods available to get rid of them. Mike had a slug problem, but had almost no aphides. Which farmer learned that aphids are resistant to pyrethroids?
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The answer is:
John
Problem: David is interested in how electricity works. One day he had two electric charges to investigate, charge A and charge B - both of the charges were negative. He also had two electric fields, field C and field D. He noticed that electric charges were moving from field C to field D. If the potential energy between charge A and charge B increases, are they closer or farther?

A:
closer