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.

Ex Input:
Article: At first, the earth's surface layer   was made up of huge blocks of hard, solid rocks. Then slowly, the rocks broke up into smaller and smaller pieces. Finally stones, pebbles   and grains of sand were formed. Many sorts of plants and animals lived and died on the surface of the earth. Their remains mixed up with the stones, pebbles and formed soil. The outmost layer of the earth is soil. There are many ways in which large pieces of rock break into smaller ones. Wind, water, heat and cold help to break up rocks. When winds blow grains of sand against a large rock for a long time, the softer layers of the rock are slowly worn away. These leave holes and cracks in the rock, which become bigger and finally the rock breaks up into smaller pieces. The moving water of streams and rivers also helps to break up rocks. As the water moves along, it carries with it small pieces of rock. These rub the larger ones. Thus, the larger rocks are worn down to smaller pieces. The heat of the sun is also helpful to breaking up rocks. When the sun shines, the rocks become very hot. If these rocks are suddenly cooled, they may crack. Ice also plays a part in making soil. Water in the cracks can turn into ice in cold weather. As this happens, it becomes bigger and the cracks become wider, and finally break into smaller pieces. 
 Answer: forms very slowly

Ex Output:
According to the passage, soil  _  .


Ex Input:
Article: A man came home from work late, tired and irritated, to find his 5-year-old son waiting for him at the door. "Daddy, may I ask you a question?" "Yeah sure, what is it?" replied the man. "Daddy, how much do you make an hour?" "That's none of your business. Why do you ask such a thing?" the man said angrily. "I just want to know. Please tell me. How much do you make an hour?" pleaded the little boy. "If you must know, I make $20 an hour." "Oh," the little boy replied, with his head down. Looking up, he said, "Daddy, may I please borrow $10?" The father was furious, "If the only reason you asked that is so you can borrow some money to buy a silly toy or some other nonsense, then you march yourself straight to your room and go to bed. Think about why you are being so selfish. I don't work hard every day for such childish behavior." The little boy quietly went to his room and shut the door. The man sat down and started to get even angrier about the little boy's questions. How dare he ask such questions only to get some money? About an hour or so, the man had calmed down, and started to think: maybe there was something he really needed to buy with that $10 and he really didn't ask for money very often. The man went to the door of the little boy's room and opened the door. "Are you asleep, son?" He asked. "No daddy, I'm awake," replied the boy. "I've been thinking, maybe I was too hard on you earlier," said the man. "It's been a long day and I took out my aggravation on you. Here's the $10 you asked for." The little boy sat straight up, smiling. "Oh, thank you, daddy!" he yelled. Then, reaching under his pillow he pulled out some crumpled up bills. The man, seeing that the boy already had money, started to get angry again. The little boy counted out his money, then looked up at his father. "Why do you want more money if you already have some?" the father grumbled. "Because I didn't have enough, but now I do," the little boy replied. "Daddy, I have $20 now. Can I buy an hour of your time? Please come home early tomorrow. I would like to have dinner with you." 
 Answer: didn't tell him at all

Ex Output:
When the boy asked his father how much he earned an hour, his father   _  .


Ex Input:
Article: A fouryearold boy has become pen pals with Britain's Queen Elizabeth.Tom Stancombe started exchanging letters with the queen after he set free a balloon,carrying his name and address,at a school party and it landed in the grounds of Windsor Castle. The queen spotted the balloon and asked her personal assistant,Angela Kelly,to write a letter on her behalf. She wrote,"The queen was delighted to find that your balloon had traveled all the way to the gardens at Windsor Castle." Tom,who proudly put the letter on his wall,wrote back to say that his great,great grandfather,the artist Petrus Johannes Arundzen,had been commissioned   to copy Dutch masters' on display at Windsor Castle and Buckingham Palace. Angela at once replied that she would contact the Royal Collection to find out what had happened to the art works.She kept her word and two weeks later wrote to Tom to tell him what had happened to the  _ ,explaining they now form part of the print collection in the Print Library. Angela then asked a favor of Tom,writing,"Would you be able to ask your Mummy and Daddy for me if they know anything more about your great,great grandfather.Royal Collection would love to know more about him." Along with his parents,Tom wrote back to fill in all the gaps about Petrus Johannes Arundzen. Although Tom's parents don't think there will be any more letters exchanged between the pair,they were touched that she had taken time to contact them. Tom's father said,"I don't expect we'll get another one,but I think it's incredible they bothered replying at all." 
 Answer: the queen's home

Ex Output:

Windsor Castle is  _  .


