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 input: 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 output: 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.
Q: Article: The World Bank has looked at the distinguishing features of successful school system. According to the World Bank's education specialist, Harry Patrinos, this include: improving the quality of teachers and making sure that teachers are highly regarded; providing information to make schools accountable and giving autonomy to schools and head teachers. This matters not only for individual pupils but also for the well-being of countries, he says, because improving educational performance has a direct impact on improving economic performance. China's education performance-- at least in cities such as Shanghai and Hong Kong-- seems to be as spectacular as the country's fast growing economy. Certainly both these open and outward-looking cities consider education to be important and are willing to adopt the best educational practices from around the world to ensure success. In Hong Kong, education accounts for more than one-fifth of entire government spending every year. "Shanghai and Hong Kong are small education systems, with a concentration of ideas, manpower and resources for education," says Prof Cheng. Under the banner "First class city, first class education", Shanghai set about systematically re-equipping classroom, upgrading schools and improving the curriculum in the last decade. It got rid of the "key schools" system which concentrated resources only on top students and top schools. Instead staff were trained in more interactive teaching methods and computers were brought in. About 80% of Shanghai school leavers go to university compared to an overall average of 24% in China. Meanwhile, dynamic Hong Kong was forced into educational improvements as its industries moved to cheaper mainland Chinese areas in the 1990s.Its survival as a service and management hub depends on upgrading knowledge and skills. In the last decade Hong Kong has concentrated on closing the gap for all students, says a report by McKinsey management consultants. The report, How the World's Most Improved School Systems Keep Getting Better, rated Hong Kong's education system among the best in the world.
Answer: what has made some education systems successful
A:
The World Bank's survey about education mainly concentrates on _ .