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.

Article: After three military  tours in Iraq and three in Afghanistan, Dennis Swols gets angry easily. He is unable to really talk about his time on the battlefield. But as Swols sits in a clinic at Fort Bragg, his hand drops to the furry head beside him. His mood brightens. Sitting at his feet, Lexy , a 5-year-old German shepherd, gives Swols a few moments of distraction  . It's her job. And, according to Swols, she is good at it. "I have a hard time talking to people about my battlefield experiences and everything," says Swols, who took part in several wars. Now he's been suffering from post-traumatic stress disorder . "I just pet Lexy. Or I'm sitting here and we won't talk about military things. We'll just talk about the dog. My day is better every time I come in." For Doctor Christine Rumayor, Lexy is a partner and a living, breathing medical tool. The dog can calm a patient and make a therapy   appointment a little more enjoyable. Animal therapy is used in only a few other army medical centers. A small number of dogs like Lexy are being used almost as co-therapists. The army is struggling to address stress disorders and mental health problems brought by more than ten years of war. One of the big difficulties is getting soldiers to seek treatment. Lexy, it turns out, is particularly good at that. Rumayor , who uses Lexy in her practice, said there was a resistance   at first. "You don't expect everyone to think they can just bring their dog to work," she said. Walking around the base, she uses Lexy to attract soldiers, and then draws them into conversation. "There's nothing better than coming to an appointment where you get to have a warm furry thing that you get to pet all the time. People don't want to come in the door. When they see Lexy coming in, it makes them want to come in the door." 
 Answer: He is suffering from post-war stress.
What do we know about Dennis Swols ?

Article: If you don't prepare yourself now, retirement may be some of the most boring and dull years of your life. To have a happy, fulfilling retirement, you need to start preparing right away. The most obvious thing for people to do when they retire is to take up a hobby. The most important step to take before retiring, though, is to make sure that you actually have started some hobbies. Once you're retired, unless you 've already started a hobby, you'll find it very hard to get into something new. Some hobbies aren't for everyone. Think about what you enjoy doing and start participating on a casual basis now. Another thing many people participate in is volunteering. Not only does volunteering give you something to do, it also gives you a sense of accomplishment  and can add meaning to your life .Volunteering is also rewarding in other ways, too. There are hundreds of different types of volunteer services and you'll always be able to meet new and interesting people. Also, don't think that volunteering is always only about helping someone for free. Many companies pay their volunteers after they've had enough experience and prove themselves to be valuable workers. There are plenty of other potions, as well. Going back to school is a great way to keep yourself feeling young. Taking a vacation around the world with your loved ones is another great way to spend your retirement. Ultimately, though, the key to a happy retirement is simply keeping yourself busy and doing whatever you love. If there's nothing you love doing now, then you'll find that once you have a vast amount of free time, your life will be pretty empty. Now is the time to find out what you want to do when you retire. 
 Answer: Because we are likely to have difficulty starting a hobby after retirement.
Why does the author suggest starting a hobby before retirement?

Article: "To educate a girl is to educate a thousand people," says Maimouna Samake, a mother of six children(including five girls). "If you put one seed  in the ground and rain comes, it will grow to produce many seeds." Samake, one of 2,000 residents, lives in a small village, Sounkala, in one of the world's poorest countries. Now she has a chance to see this wish come true thanks to build On, an American non-profit organization that is building a school in her community. For 17 years, build On has been sending American high school students overseas to create schools in places where literacy and formal education are usually out of reach. The organization has built about 300 schools in Mali, Malawi, Nepal, Senegal, Nicaragua and Haiti. Its goal is to get young Americans in mostly urban  areas to get involved in education. At the same time it can bring literacy to children and adults in poor villages in the developing world. Sounkala's school only has about 70 children; mud floors, poor lighting, few desks and an absence of books mean that the school is not the most ideal learning environment. Therefore they certainly could use build On's help. Samake hasn't been to school, but she wants a better future for her five daughters, including Ramatou, 12, and Mariam, 10. "When a woman attends school, she will teach what she learns to her children," said Ramatou, who wants to become a doctor. "She will also know how to take better care of her family." Build On tries to build schools for grades one to three. If things go well over those three years, they return to help build another school for grades four to six, and then set up evening adult literacy classes. Ramatou and Mariam will not learn inside the walls of build On school since they are already in the sixth grade, but Samake hopes that they will be able to attend evening classes to continue learning. 
 Answer: Its sources of money.

Which of the following aspects of build On is NOT mentioned in the text?

