In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: THURSDAY, July 9 (Health Day News) -- A new study that found that a lower calorie diet slowed the aging process in monkeys could be the best proof yet that restricted diets might do the same for humans. "The big question in aging research is, 'Will caloric restriction in species closely related to humans slow aging?'" said Richard Weindruch, senior author of a paper appearing in the July 10 issue of Science. This is the first clear demonstration that, in a primate species, we' re inducing a slowdown of the aging process -- showing increased survival, resistance to disease, less brain atrophy and less muscle loss. "This predicts humans would respond similarly," added Weindruch, professor of medicine at the University of Wisconsin and an investigator at the Veterans Hospital in Madison. Another expert noted that, despite some highly publicized studies in certain species, the link between restricted eating and longer lifespan has been far from proven. "The idea that dietary restriction extends lifespan in all species is not true. Many strains of rats and mice do not respond. In some strains, it' s actually deleterious," explained Felipe Sierra, director of the biology of aging program at the US National Institute on Aging (NIA), which supported the new study. "The fact that it doesn't work in some mice but it does seem to work in monkeys is surprising and it gives us hope." But there's a larger question: how to change humans' increasingly careless eating habits. "This finding doesn't give me hope that humans are going to go into dietary restriction," added Marianne Grant, a registered dietitian at Texas A&M Health Science Center Coastal Bend Health Education Center in Corpus Christi.
Answer: This experiment indicates restricted diets could extend humans' lifespan.

A: Which of the following statements about Weindruch is true?
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Q: Article: A father wanted to buy a horse for his son. After looking at many horses, the man's decision was almost made. It had come down to a choice between two horses. They were quite similar and the prices were the same. He decided to take another look so he could make a final decision. The first farmer was eagerly trying to sell his horse and talked much about how cute his horse was, but the father didn't reach a decision. The second farmer was different. He didn't say anything about the horse, but he simply said that he was sure the man's son would love his horse. He offered to bring the man a saddle , a bridle , the horse and enough food for it for 30 days. In return , the father should give him a check, and he would hold it for 30 days. If the man's son decided to keep the horse, he could let him know at the end of the 30 days, and he would cash the check. Otherwise, he would give back the man's check, pick up the horse and even clean up where the horse had been to. Which farmer do you think sold his horse? Can you see that if you promise buyers reliable business dealings with you, you are more likely to be successful? The farmer gave more far beyond what the father thought or even imagined.
Answer: The two horses were quite similar.

A: Why was it hard for the father to make a decision at first?
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Q: Article: A sense of humor is just one of the many things shared by Alfred and Anthony Melillo, 64-year-old twin brothers from East Haven who made history in February 2002. On Christmas Eve, 1992, Anthony had a heart transplant from a 21-year-old donor. Two days before Valentine's Day in 2002, Alfred received a 19-year-old heart, marking the first time on record that twin adults each received heart transplants. "I'm 15 minutes older than him, but now I'm younger because of my heart and I'm not going to respect him," Alfred said with a big smile, pointing to his brother while talking to a roomful of reporters, who laughed frequently at their jokes. While the twins knew that genetics might have played a role in their condition, they recognized that their eating habits might have also contributed to their heart problems. "We'd put half a pound of butter on a steak. I overdid it on all the food that tasted good, so I guess I deserved what I got for not dieting properly." The discussion moved to Anthony's recovery. In the five years since his heart transplant, he had been on an exercise program where he regularly rode a bicycle for five miles, swam each day, and walked a couple of miles. He was still on medication, but not nearly as much as Alfred, who was just in the early stage of his recovery. "Right now I feel pretty young and I'm doing very well," Anthony said. "I feel like a new person." Alfred said his goal, of course, was to feel even better than his brother. But, he added, "I love my brother very much. We're very close and I'm sure we'll do just fine."
Answer: Love for bicycling.

A:
What did Alfred and Anthony have in common?
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