You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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: "Mom, you should put some of your things away. The house should be safe for the baby," said my son Mark as he walked upstairs with his wife and fifteen-month-old Hannah. They visited us for the Thanksgiving holiday. After driving all day from Salt Lake to Ft. Collins, his temper showed. "That one finger rule may work with other kids, but never Hannah," he insisted. When my three granddaughters first moved into our house three years ago, my friend offered me her secret to behave grandchildren. "Teach them the 'one finger rule'." All of her five grandchildren learned it at a young age and it proved to also work well with mine. I picked up my granddaughter and said, "Well, Mark, just watch." I hugged her and walked all around the great room. "Hannah, you may touch anything in this room you want, but, you can only use one finger." I showed the technique by touching my forefinger to the sculpture. Hannah followed my example. "Good girl. Now what else would you like to touch?" She stretched her finger toward the lamp. I allowed her to touch everything in sight, plants, glass objects, TV, VCR, speakers, etc. If she started to grab , I gently reminded her to use one finger. She always obeyed. However, Hannah, an only child, possessed a more adventurous personality. Her father predicted it would prevent her from accepting the "one finger rule". During their four-day stay, we aided Hannah in remembering "one finger rule". She learned quickly. Months later, my husband and I drove to Salt Lake. I watched Mark continue to practice the one finger rule. I smiled happily each time he asked Hannah to touch with "one finger".
Answer: visit the author for the Thanksgiving holiday
Solution:
Mark and his family came to the author's house to _ .