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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.

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
Solution: Researchers did experiments on kids in order to find out _ .
Why? 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: Article: Top 10 Best-Sellers for $10 ( regularly between $15.95-$19.95) Based on October's sales, our customers have chosen our 10 bestselling books and today we are placing these top 10 bestsellers on sale for $10 each! Heart of a Caregiver is a book in praise of all the unknown heroes who provide loving care for others each day -- nurses, hospital workers, the CNAs and so on. It's the only book of its kind on the market that is devoted to thanking caregivers. We all know caregivers who have touched our lives. This book makes a beautiful gift to thank them for the beautiful work they do. Regularly priced at $15.95, today it's only $10. Friends, the family we choose for ourselves is a book that you'll want to read and more importantly, one you'll want to share with all of your friends, to thank them for their gifts of time, encouragement and support. This heartwarming book makes a great gift for Christmas or for any time! Regularly priced at $15.95, today it's only $10. The Richest Man in Town is certain to make you laugh, cry and think about life. It's a true story that describes the important things in life in an unforgettable way. It is a beautifully written, heartwarming story about an amazing man who touched so many people in a special way. Marty was a simple man who ran a cash register in a Wal-Mart store in South Dakota. He worked hard and was good to people. Can it be so simple? It's a meaningful story to share with friends, family and all employees. They will love it, and love you for giving it. Regularly priced at $19.95, today it's only $10. Now that we have given you a preview of our top 10 list, click here to see all top 10 books available today only for $10 each! Make sure to share this email with your friends and family so they can enjoy the savings too! Sale ends tonight, Thursday 11/03/2011 at 11:59 pm CST .
Answer: on the Internet
Solution:
The advertisement may be found _ .