Given the task definition, example input & output, solve the new input case.
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
Output: Researchers did experiments on kids in order to find out _ .
It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

New input case for you: Article: Have you ever wondered what you will be when you grow up? Perhaps you have thought of becoming an engineer or an environmentalist. Here's good news: you can combine all of these career goals by designing, building and operating a solar-powered house. That is what students from 20 universities did as they competed in the U.S. Department of Energy 2009 Solar Decathlon . Like a game show where teams compete against each other, the Solar Decathlon's student teams competed against each other in ten separate events to see who could build the best solar-powered house. The team from Germany took the top honor. The contest is held on the National Mall in Washington D.C., and is open to the public. In order to win, the Decathlon's teams have to successfully host a dinner party, do the laundry, run the dishwasher, and maintain a comfortable temperature in their solar-powered houses. They also have to make their houses look attractive. Team Germany's winning "Cube House" produced a surplus of power, even during three days of rain. This is the fourth time the Solar Decathlon has been held. The houses keep getting better and better. "The Department of Energy does research on solar and building technologies. In the 1990s, we were seeking expertise to help design houses that would integrate solar systems in a reliable way. I came up with the idea of having a competition to challenge students at architecture and engineering schools to design solar-powered houses from the ground up. I thought that having a competition would motivate these students to be creative. The new generation of our country should be innovative . They may come up with solutions that would help our country," said Richard J. King, the Decathlon's Director.
Answer: motivate students to be creative
Output:
Richard came up with the idea of having a competition mainly to _ .