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: Rodd and Todd were lucky children chosen to see Santa Claus himself up at the North Pole. Some elves come in and said, "Santa Claus is very busy. You'll only be able to see him for a short while, so make the most of it." Santa Claus appeared, carrying all the toys the two boys had ever wanted. While Todd ran to hug Santa Claus, Rodd went over to the bicycle he had always dreamed of having. Santa was only there for a few seconds, and disappeared before Rodd had even looked at him. He cried and complained, but within a few hours the two boys had been returned to their homes. From that day on, every time Rodd saw a toy he felt the excitement of receiving a present, but he would instantly look around to see what else of importance he was missing. And in this way, Rodd helped those who had nothing, giving love to those who almost never received it, and putting smiles on the faces of the unhappy. All by himself, he managed to change the atmosphere of his town, and no one could know him without being grateful to him. One Christmas, while he was sleeping, he felt someone pulling his leg. Rodd opened his eyes and saw the long white beard and the soft red suit. "Forgive me. I didn't know how to choose what was most important," said Rodd. But Santa Claus answered with a smile. "I chose to spend some time with the best boy in the world, just before I leave you the great gift you've earned for yourself. Thank you!" And the next morning, there were no presents under the Christmas tree. That Christmas, the gift had been so big that it couldn't fit down the chimney; the only place it could fit was in Rodd's heart.
Answer: not to ask for too many gifts for Christmas
Solution: The story mainly tells us _ .