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.

Input: Consider Input: Article: Of all nature's disasters, forest fires are often considered the most frightening. Moving at lightning speed, huge walls of flames can burn acres of land in just a few minutes. And although technology, including the use of tire-retardant chemicals, has greatly helped the fight against forest fires, they still take great damage. According to the National Interagency Fire Center, the fire season last year was the worst on record in terms of the number of fires and acres burned. There were 96.385 fires and9,873429 acres affected by fire in a year that was 125% more destructive than the 10-year average . These fires cost the federal govemment $1.5 billion to fight, and this figure does not include the money spent by local and state govemments as part of the effort. Fires in the southern states represented half of the national total last year. with Texas. Oklahoma and Arkansas being home to an usually high amount of activity. Wildfire have also taken place in Western states such as California, Colorado. and Alaska throughout the past 10 years. It is said that two-thirds of forest fires are started accidentally by people. almost one quarter are purposely set, while lighting causes 10%. Forest fires can have advantageous effects. Charcoal enriches soil, and some plant species grow well after. The cones of the jack pine tree, for example, will not spread their seeds unless there is heat. Douglas fir trees grow best in open sunlight areas after fire.
Answer: they spread too fast and make great damage.

Output: Forest fires are considered to be the most frightening because _ .

Input: Consider Input: Article: Charlie studied in a famous college for four years. He studied hard and did well in all his subjects. He hoped to become a good teacher. This year he left the college and began to work in a middle school. He likes his students and is strict with them. He does his best to make his classes lively and interesting. One day he carefully explained a chemical reaction to the students of Grade 2 in the chemistry lab. "Be careful, everyone," he said loudly. "Before I make the experiment,there're twenty five atoms of carbon ,but after I finish it, there're twenty four atoms of carbon left!" He stopped to watch the classroom and hoped his students would go on explaining it. But the young men looked at each other and nobody answered him. He had to ask, "What happens? What makes the atom lost?" The classroom was very quiet and none of the students looked at their teacher. "Who can tell us where it has gone?" Suddenly a soft voice came from the back row, "We did not see anybody leave the lab!"
Answer: his students could do well in chemistry

Output: Charlie hopes _ ,so he does his best to make his classes lively and interesting.

Input: Consider Input: Article: The Winter Olympics is also called the White Olympics. At that time, many color1ful stamps are published to mark the great Games. The first stamp marking the opening of the White Olympics was issued on January 25th, 1932 in the United states to celebrate the 3rd White Olympics. From then on, issuing stamps during the White Olympics became a tradition. To observe the 4th Winter Olympic Games, a group of stamps were published in Germany in November, 1935. The five rings of the Olympics were printed on the front of the sportswear. It was the first time that the symbol appeared on stamps of the Winter Olympics. In the 1950s, the stamps of this kind became more color1ful. When the White Olympics came, the host countries as well as the non-host countries published stamps to mark those Games. China also published four stamps in February, 1980, when the Chinese sportsmen began to march into the area of the Winter Olympics. Japan is the only Asian country that has ever held the White Olympics. Altogether 14,500 million stamps were sold to raise funds for the sports meet. Different kinds of sports were represented on these small stamps. People can enjoy the beauty of the wonderful movements of the athletes.
Answer: of the same meaning
Output: The White Olympics and the Winter Olympics are _ .