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.

Article: Cats are creatures of habit. They like to go to sleep about the same time every day and for a certain length of time. They seem to have a natural clock inside them that tells them when to sleep. Cats increase their regular sleep with occasional cat naps . Some experts feel that humans could also benefit from this habit. Cat naps help to build up energy in the body. They are also a good way to get rid of trouble! Since cats have the same moods as humans, some experts believe that people can improve their moods. People might become happier. A number of famous people have copied cats by taking cat naps during the day. The naps would usually last from 15 to 30 minutes. Winston Churchill took cat naps. So did Presidents Harry Truman, John F. Kennedy, and Lyndon B. Johnson. These famous men were known for their energy. They were also able to work long hours, often into the night. Napping was their secret.
Answer: take naps when they are not happy
From this selection we know that cats _ .

Article: Recently we've observed an increasing request from disadvantaged and regional schools for attending one of our zoo areas at no cost or partly paid some organizations. Zoos Victoria believes that all children should have the opportunity to have an early memory of visiting the zoo, and gain an understanding of the wild and natural world that humans share with animals. Zoos Victoria wins the support of the Ian Potter Foundation to help achieve this goal. Funding available for schools to enter an educational program at Zoos Victoria in 2012 Applications are open from November 23, 2011 to February 12, 2012. Children from disadvantaged and originally isolated schools are provided with the opportunity to visit the zoo and attend an interactive education experience at no charge. The program objectives are: *To start developing "environmentalists" within low social and economic groups. *To support the youth from disadvantaged backgrounds to have greater awareness of wildlife and have ongoing opportunities to get relevant information about animals and the environment through the zoos' website. What is covered under the program? *Travel to the zoo -- transport costs will be partly or fully paid back to the school on the basis of the number of children applying for the program. *Student entry to one area of Zoos Victoria and an educational experience. Which schools are able to take part in the program? *Open to schools in Victoria. *Consideration will be given to schools that have not previously been able to enter one of our zoo areas, list as "disadvantaged" ones or come from regionally isolated areas. *Able to visit an area of Zoos Victoria within the 2012 school year. *Applications must be supported by the school principal . *Able to complete a short evaluation of the program. How to apply for the program? *Download the application forms. *Complete all the details, including a signature from your principal and attaching a quote for transport costs. *Return the application forms to Margaret Harwood at Zoos Victoria by email to mharwood@zoo.org.au or by post to PO Box 74, Parkville, VIC 3052. *Please contact Margaret Harwood at 03 9285 9462, if there are any further questions.
Answer: develop a passion for wildlife and nature
Zoos Victoria wanted to help students in disadvantaged and regional schools _ .

Article: Here is a story told about an American general who was a very important figure in the American army during the First World War. Everybody in the United States knew him and many people wished to have a picture or something of his in their homes. Soon after the war the general returned to Washington. One day he went to a dentist and had six teeth pulled out. A week later the general heard that his teeth were being sold in curiosity shops as $ 5 each. On each of the teeth there was a label with the name of the general and words: "Buy these teeth and show them to your friends at home." The general got angry. He rushed to his office and ordered six officers to go around the city and buy all his teeth. The officers went out and visited every curiosity shop in the capital. They were away from the office all day. In the evening they returned and put on the table in front of the general the teeth they had bought. They had collected 175 teeth.
Answer: after 1918
The general returned to Washington _ .