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: Cloud seeding is a method of artificially causing clouds to produce precipitation in the form of rain or snow.Cloud seeding has also been used in attempts to modify the severity of hail storms and hurricanes.The effectiveness of cloud seeding remains controversial .but it continues to be used in some regions to try to increase rainfall for agriculture and to build snow packs for water supplies and power production. Cloud seeding was developed by American scientists Irving Langmuir and Vincent Joseph Schaefer during and after World War II.Their work began as an effort to learn more about the buildup of ice on airplane wings, and eventually led them to attempt to create rainfall by releasing several pounds of crushed frozen carbon dioxide into a cloud from an airplane.In this form, the carbon dioxide is called dry ice.On November 13, 1946, the technique appeared to produce snow directly under the cloud; the snow then turned to rain as it fell to the ground. For their experiment, Langmuir and Schaefer selected a supercooled cloud, one in which the water droplets remain liquid in subfreezing temperatures.Their theory was that small grains of dry ice falling through the cloud would cause tiny droplets of water vapor in the cloud to freeze into crystals that attracted more water vapor.Their theory proved to be correct and eventually the crystals became heavy enough to fall from the cloud as snow.As the snow reached the warmer temperatures closer to the ground, it melted and became rain. Another scientist, Bernard Vonnegut, produced a method of cloud seeding using silver iodide .He used particles of silver iodide because its crystal structure resembled that of ice in clouds.Silver iodide also had practical advantages over frozen carbon dioxide It could be stored at room temperature and did not require an airplane as a delivery mechanism.Instead, silver iodide crystals could be fired by cannons high into the air, where wind carried them into the clouds.
Answer: it is similar

Ex Output:
Bernard chose silver iodide as a method of cloud seeding because _ .

Ex Input:
Article: Joke l: A man was sitting reading his papers when his wife hit him round the head with a frying pan. "What was that for?" the man asked. The wife replied, "That was for the piece of paper with the name Jenny on it I found in your pocket." The man then said, "When l was at the races last week Jenny was the name of the horse I bet on." The wife apologized and went on with the housework. Three days later the man was watching TV when his wife hit him on the head with an even bigger frying pan, knocking him unconscious. Upon regaining consciousness the man asked why she had hit again. Wife replied, "Your horse phoned." Joke 2: "Do you believe in life after death?" the boss asked one of his employees. "Yes, sir, " the new employee replied. "Well, then, that makes everything just fine, " the boss went on. "After you left early yesterday to go to your grandmother's funeral. she stopped in to see you!" Joke 3: "Oh, I am happy to see you, " the little boy said to his grandmother on his mother's side. "Now maybe daddy will do the trick he has been promising us. " The grandmother was curious. "What trick is that?" she asked. "I heard him tell mommy that he would climb the walls if you came to visit, " the little boy answered. Joke 4: A woman's husband had been slipping in and out of a coma for several months, yet she had stayed by his bedside every single day. One day, he signaled for her to come nearer. As she sat by him, he whispered, eyes full of tears, "You know what? You have been with me all through the bad times. When I got fired, you were there to support me. When my business failed, you were there. When I got shot, you were by my side. When we lost the house, you stayed right here. When my health started failing, you were still by my side... You know what Martha?" "What dear?" she gently asked, smiling as her heart began to fill with warmth. "I'm beginning to think you're bad luck..."
Answer: her husband's pocket money was lost without any reason

Ex Output:
The wife became angry suddenly in Joke 1 because _ .

Ex Input:
Article: To most people, noise pollution is a jet flying over their head. For one Spanish woman, it is a neighbor playing the piano. The woman has taken her neighbor to court. Now she wants to send her neighbor to prison for over seven years on the charges of psychological damage and noise pollution. In a country known for its noisiness, the case has raised eyebrows. Neighbors often complain about street noise in Spain, but people seeking prison time for someone practicing the piano is unheard of. At the trial, Sonia Bosom says she has been suffering noise pollution up to now due to the practice sessions of Laia Martin, who lives below her. Martin, 27, didn't admit that she played at home that often, saying she took regular classes in other towns and mostly practiced at home on the weekends. On the first day of the trial, the newspaper reported that Bosom told the court she now hated pianos so much that she couldn't even stand seeing them in a film. Bosom says years of hearing constant playing has caused her "psychological injury". Medical reports show she has suffered from a variety of problems, including insomnia , anxiety, and panic attacks. She says tests by local authorities have found that the sound levels made by the piano are up to 10 decibels higher than the limit. City authorities have asked the family several times to either stop the piano playing or soundproof the room. The family told the court they carried out soundproofing work twice but the complaints continued. The court hasn't made a final decision. A spokeswoman says the trial will end before May.
Answer: Martin's playing the piano damaged her health

Ex Output:
Bosom wants to send Martin to prison because _ .