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.

Let me give you an 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
The answer to this example can be: Researchers did experiments on kids in order to find out _ .
Here is why: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

OK. solve this:
Article: One afternoon Peter and Jim went out for a bicycle ride. When they passed a place they saw a large area of grass and bushes on fire and a strong wind was blowing the flames towards a village. The firemen had already arrived and were trying to put out the fire. The boys left their bicycles and ran towards the village to see if they could help to fight the fire. On the way they met two firemen. "Quick, you boys," said one of the firemen. "Come and help us to pull a pump to the stream. We can't beat out the fire. The wind is too strong. The pump is our only hope." The two boys ran further until they came to a heavy pump. They helped to pull it to a stream not far from the village. Soon the pump was working well so the boys went to watch the fire. It had already reached the edge of the village. The boys saw that two houses were on fire, and the flames were attacking a third building. Suddenly there was a shout from one of the villagers. "Keep away!" a voice shouted. "There's paint stored in that building." The boys and villagers moved away quickly. With a loud explosion , the whole building burst into flames, sending clouds of thick black smoke into the sky. At this time Peter and Jim began to think that the whole village would be burnt to the ground. The firemen had left the burning buildings and were pouring water onto the neighboring houses, trying to stop the fire from spreading. Then the wind died down. A second pump was brought up to help, and the fire was gradually put out. "It's soon finished," Peter said to his friend. "We must go or we shall get home late." "Yes, come on," agreed Jim, and with a last look at the ruins, they walked back to their bicycles.
Answer: warn the villagers
Answer:
Seeing the fire, the boys ran to the village to _ .