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: Some British and American people like to invite friends for a meal at home. But you should not be upset if your English friends don't invite you home. It doesn't mean they don't like you! Dinner parties usually start between 7 and 8 p.m., and end at about 11. Ask your hosts what time you should arrive. It's polite to bring flowers, chocolates or a bottle of wine as a gift. Usually the evening starts with drinks and snacks . Do you want to be more polite? Say how much you like the room, or the picture on the wall. But remember--it is not polite to ask how much things cost. In many families, the husband sits at one end of the table and the wife sits at the other end. They eat with their guests. You'll probably start the meal with soup or something small, then you'll have meat or fish with vegetables, and then dessert, followed by coffee. It's polite to finish everything on your plate and to take more if you want it. Did you enjoy the evening? Call your hosts the next day, or write them a short thank you letter. British and American people like to say " Thank you, thank you, thank you." all the time!
Answer: you'd better bring a certain present with you
Output:
If you are going to attend a dinner party, _ .