In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
Example: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Example solution: Researchers did experiments on kids in order to find out _ .
Example explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

Problem: Article: Sam Walton, the founder of Wal-Mart, was born in Kingfish, Oklahoma on March 29, 1918. He was raised in Missouri where he worked in his father's store while attending school. This was his first retailing experience and he really enjoyed it. After graduation, he began his own career as a retail merchant. He soon opened his first Wal-Mart store in 1962 in Rogers, Arkansas. Wal-Mart specialized in name brands at low prices and Sam Walton was surprised at the success. Soon a chain of Wal-Mart stores sprang up across rural America. Walton's management style was popular with employees and he founded some of the basic concepts of management that are still in use today. After taking the company public in 1970, Walton introduced his "profit sharing plan". The profit sharing plan was a plan for Wal-Mart employees to improve their income dependent on the profits of the store. Sam Walton believed that "individuals don't win, teams do". Employees at Wal-Mart stores were offered stock options and store discounts. These benefits are commonplace today, but Walton was among the first to implement them. Walton believed that a happy employee meant happy customers and more sales. He also believed that by giving employees a part of the company and making their success dependent on the company's success, they would care about the company. By the 1980s, Wal-Mart had sales of over one billion dollars and over three hundred stores across North America. Wal-Mart's unique decentralized distribution system, also Walton's idea, created the _ needed to further encourage growth in the 1980s during growing complaints that the "superstore" was stopping smaller and traditional stores from developing. By 1991, Wal-Mart was the largest US retailer with 1,700 stores. Walton remained active in managing the company, as president and CEO until 1988 and chairman until his death. He was awarded the Medal of Freedom shortly before his death.
Answer: he specialized in name brands at low prices
Solution: Sam Walton first made a hit in retailing when _ .