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: China Daily: As China comes down from a travel rush during the seven-day holiday for National Day, people called for a return of the Labor Day Golden Week holiday as a way to ease the travel peak. By Friday, 79 million passengers were expected to have used the railways up about 8 percent over last year. Waterways had shipped around 2 million, a rise of about 17 percent on last year, www. cntv. cn, the website of China Central Television, said on Saturday. As large numbers of tourists _ scenic spots around China, it caused huge crowds and many complaints. The Forbidden City in Beijing has long been a big draw for travelers. On Tuesday alone, the museum reported, it received more than 180,000 visitors, about six times higher than a regular day. According to China Central Television, restless visitors demanded their money back from the tourism committee, and police were sent to help deal with the problem. The Beijing-HongKong-Macao expressway, the Shanghai-Kunming expressway and the route from Beijing to Kunming saw large increases in traffic on Saturday, according to www. cntv. cn. "As there are only two long holidays in the country and paid leave is not well carried out by employers , people have limited chances for travel", Dai Bin, the director of China Tourism Academy, said in a report by Beijing Times on Saturday. "The travel rush during the 'Golden Week' holidays happens because people do not take long journeys during shorter holidays", said Liu Simin, a researcher with the China Academy of Social Sciences, in a report by Beijing Times on Saturday. Liu said that now the most important task is to ease the pressure from the huge numbers of tourists. When the Labor Day Golden Week holiday came to an end in 2007, a chance to travel was reduced. In 2008, the government shortened the Labor Day Golden Week holiday, usually lasting from May 1 to May 7, to three days and added three other short vacations to the list.
Answer: four days
Output:
The Labor Day Golden Week holiday was shortened to _ .