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.

Q: Article: San Francisco has long been a favorite place for travelers who are ready to learn languages.The mild year-round climate, shops and restaurants, bars and night-life, and some of the most beautiful scene in the US attract many visitors to this relaxing and welcoming city.Students are sure to find the San Francisco Bay Area an interesting, safe and friendly place in which they can live and study.This is the most important. English School in San Francisco is located in the heart of the city.It is one of the best San Francisco English language schools.You can see views of the city from your classroom! Many buses stop less than a five-minute walk from the school, which is also just a two-minute walk from the famous Union Square, San Francisco Shopping Centre, the Financial District, Yerba Buena gardens and the Museum of Modern Art.The school is minutes away from the cable cars to Chinatown and Fisherman's Wharf and a boat ride on the bay. San Francisco is a great place to study English and learn about American culture, offering excellent opportunities in sports, entertainment and arts.The city borders excellent beaches, and you can sail or surf all year round. San Francisco has more restaurants than any other city in the US, and is the home of many theaters, music and dance companies, as well as museums.Just walking through the many areas of San Francisco, you are certain to find something wonderful.
Answer: a good place to live and study in

A: That San Francisco attracts students most might be _ .
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Q: Article: Hundreds of years ago, a Roman army came north from England to make war on Scotland. The Scots, a brave people, love their country. They fought hard to drive the enemy out of Scotland. But there were too many of the Romans. It looked as if the Romans would win. One night, the leader of the Scots marched his soldiers to the top of a hill. "We will rest here tonight, my men," he said, "Tomorrow we will fight one more battle. We must win, or we will die." They were all very tired. So they ate their supper quickly and fell asleep. There were four guards on duty, but they were very tired, too, and one by one, they fell asleep. The Romans were not asleep. Quickly they gathered at the foot of the hill. Slowly they went up the hill. Closer they came to the sleeping Scots. They were almost at the top. A few minutes more the war would be over. Suddenly, one of them put his foot on a thistle . He cried out and his sudden cry woke the Scots. In a minute they were on their feet and ready for a battle. The fighting was hard, but it did not last long. The Scots wiped out the Romans and saved Scotland. The thistle is not a beautiful plant. It has sharp needles all over it. Few people liked it. But the people of Scotland liked it so much that they made it their national flower.
Answer: came to the north Scotland from England to make war on Scotland

A: Hundreds of years ago, the Romans _ .
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Q: Article: Watching a 3D movie can more than double the concentration powers and cognitive processing of children, a new research claims. A study made by visual technology firm RealD and led by child psychologist Dr Richard Woolfson suggests that childrenaged between 7 and 14 experienced twice the cognitive processing speed and performed better in testing after watching 20 minutes of a 3D film. This is despite suggestions that attention spans in children have shortened in the last decade due tounlimitedto access to entertainment, including on-demand TV, gaming and social media. A 2015 study claimed that watching 3D content had a similar effect to brain-training exercises. Consumer psychologist Mr Fagan said that the increasedstimulation found in watching something in 3D "exercised" the brain and improved performance in the short term. "3D films can play the role of 'brain-training' games and help to make children 'smarter' in the short term," he said. "The shortening of response times after watching 3D was almost three times as big as that gained from watching 2D; in other words, 3D helps children process aspects of their environment more quickly. This is likely to be because 3D is a mentallystimulatingexperience which 'gets the brain's juices flowing'." The experiment saw children given a range of cognitive tests before watching 20 minutes of a movie in either 2D or 3D and being tested again. The results showed those who saw the 3D content reacted faster and performed bettering the second round of testing. Mental engagement also rose by 13% among 3D watchers. Child psychologist Dr Woolfson added that "supportive parenting" and regularly listening to classical music can also aid a child's memory.
Answer: a 3D movie makes their brain active

A:
The reason why children perform better after watching a 3D movie is that _ .
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