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: There was once a farmer who lived near a road. It was not a busy road,but from time to time,cars passed the farm. Near the farm gate, there was a large hole in the road. this hole was always full of water, and the drivers of the cars could not see how deep the hole was. They thought it was probably not deep.So when they drove into the hole, they could not drive out because it was so deep. The farmer did not spend much time working on his farm. He spent most time watching the hole. Whenever a car drove into it, he would pull the car out with his tractor and he would charge the drivers for much more money than they had expected. One day, a driver of a car said to him, "You must have made a lot of money pulling cars out of this hole night and day." "Oh no," the farmer said, "I don't pull cars out of the hole at night. At night I fill the hole with water."
Answer: liked very much driving through water
Example Output: Many cars went into the hole because the drivers _ .

Example Input: Article: BEIJING, Oct. 13 (Xinhuanet) -- A recent sudden temperature drop in most areas of China has set off fears of a possible return of severe acute respiratory syndrome (SARS) and the country has mobilized to prepare for another outbreak. North China's Tianjin Port resumed a temperature reporting system on Sunday. Any passengers through the port with a temperature above 38 degrees Celsius would be provided medical observation and reported to relevant authorities. Zhong Nanshan, a well-known anti-SARS scientist during the last outbreak, said it was unlikely the SARS virus would die out naturally and it would definitely come back, but predicted no widespread epidemic outbreak and the epidemic would not cause serious damage again. Caught unprepared this spring, Chinese authorities have learned to act quickly before the epidemic can take a hold. Chinese Vice-Premier Wu Yi Thursday urged strictly implementing the daily SARS epidemic reporting system and warned that people delaying reporting or hiding the true situation would be severely punished. In Beijing, the disease control center in Dongcheng District has recovered a 24 hour schedule for possible epidemic breakout. Every afternoon before 3:00 o'clock, the center receives SARS reports from every hospital in the district and then reports to the Beijing municipal disease control center and health bureau. In Beijing Xiehe Hospital, plans are ready for fever patients to receive treatment in a special section. Doctors in that ward, wearing protective clothing, will observe patients for any possible respiratory diseases. Patients with high fever and symptoms of respiratory diseases are required to be observed for one or two weeks. North China's Shanxi Province and Inner Mongolia Autonomous Region, the two other hardest-hit areas in the last SARS crisis, have both set up an emergency response mechanism and mobilized all concerned departments. The system has also been set up in rural Inner Mongolia. People are urged to pick up again the healthy habits they formed during the last SARS outbreak. Zhong Nanshan said the most important way to prevent SARS was to play more sports and maintain good ventilation. Spitting in public and eating wild animals were very dangerous, said Zhong.
Answer: What hospitals in Beijing have done
Example Output: This passage is mainly about _ .

Example Input: Article: Everyone talks about the greenhouse effect and how our Earth and its climate are being affected. We can do a science experiment designed by some kids to show this effect and what is happening to the Earth. First prepare the following items: *2 glass containers that need to be the same size and shape *1 gallon plastic bag *4 cups of very cold water *Ice cubes Fill each container with two cups of cold water. Add the same amount of ice cubes to each container. Then put one of the containers in the plastic bag and close it tight. Put both containers in the sun together and keep them there for at least an hour. At the end of one hour remove the container from the plastic bag and immediately check the temperature of the water. After you record this, find out the temperature of the water that is not covered. When you place the containers in direct sunlight, the air inside the bag becomes very warm. The heat filters in but cannot escape so it stays in the closed plastic bag and increases the temperature. What if you leave that for two, three or four hours? Think about what is happening to the Earth. There are chemicals that are creating a type of plastic bag around the Earth. It causes our air to get warmer because of the heat from the sun being kept in this closed area. Think about your car in the hot summer. This is what happens when you leave your car outside all day. This greenhouse effect has caused your car to be so hot that you sometimes cannot even touch the steering wheel. This science project goes to show what affects our planet.
Answer: chemicals around the Earth
Example Output:
According to the text, the greenhouse effect appears mainly because of _ .