In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
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Question: Article: Mail was usually carried west on ships that sailed around the bottom of South America and then north to California.That could take several months. So, in eighteen fifty-seven, D.C.Lawmakers in Congress in Washington wanted to make it possible to send mail all the way across the United States by land.Congress offered to help any company that would try to deliver mail overland to the West Coast. A man named John Butterfield accepted this offer. He developed plans for a company that would carry the mail--and passengers, too. Congress gave John Butterfield six hundred thousand dollars to start his company. In return, he had to promise that the mail would travel from Saint Louis, Missouri, to San Francisco, California, in twenty-five days or less. It was not possible to travel straight through because of the Rocky Mountains and the deep snow that fell in winter. So the stagecoach would travel south from Saint Louis to El Paso, Texas, then over to southern California, then north to San Francisco. The distance was about four thousand five hundred kilometers. Two hundred of these stations were built, each about thirty-two kilometers apart. The workers were to quickly change the horses or mules whenever a stagecoach reached the station. There could be no delay. Each stagecoach was to travel nearly two hundred kilometers a day. One hundred stagecoaches were built and painted red or dark green. They were the most modern coaches that money could buy. They were designed to hold as many as nine passengers and twelve thousand pieces of mail. The seats inside could be folded down to make beds. Passengers either slept on them or on the bags of mail. The cost would be one hundred fifty dollars to travel from Saint Louis to San Francisco. If a passenger was not going all the way, the cost was about ten cents a kilometer. The passengers had to buy their own food at the stations. The stagecoach would stop for forty minutes, two times a day. The company warned passengers about the possible dangers. A poster said: "You will be traveling through Indian country and the safety of your person cannot by granted by anyone but God."
Answer: The history of the first stagecoaches carrying mail to the American West.

Answer: What is the passage mainly about?

Question: Article: Jack threw the papers on my desk. "Next time you want to change anything, ask me first," he said. I had changed a long sentence and corrected its grammar -- something I thought I was paid to do. Several days later, he made me angry again. I went to his office, prepared to lose my job if need be, but not before I let the man know how I felt. "What?" he said nervously. Suddenly I knew what I had to do. "Jack, the way you've been treating me is wrong. And it's wrong for me to allow it to continue," I said. "I want to make you a promise. I will be a friend." The next day I brought some cakes to Jack's office. Every time I saw Jack in the hall, I smiled at him. After all, that's what friends do. One year after our talk, I was told that I had breast cancer . When I was in hospital, my friends tried to find the right words to say, but no one could. The last day of my hospital stay, the door opened and Jack walked over to my bed. "Tulips ," he placed some bulbs beside me and said, "If you plant them when you get home, you'll be there to see them when they come up." Tears filled my eyes. In a moment when I prayed for just the right words, a man with few words said the right thing. After all, that's what friends do. Now, I have seen those tulips push through the soil every spring for over ten years.
Answer: He didn't agree with her correction.

Answer: Why did Jack throw some papers on the author's desk?

Question: Article: About the year 1900,a small,darkhaired hot boy named Charlie Chaplin was often seen waiting outside the back entrance of London Theatre.He looked thin and hungry.He was hoping to get work in show business.He could sing and dance;above all,he knew how to make people laugh.But he couldn't get work and so he wandered about the city streets.Sometimes he was sent away to a home for children who had no parents. But twenty years later this name Chaplin became the greatest,bestknown,and bestloved comedian in the world.Any visitor to the cinema must have seen some of Chaplin's filmstrips .People everywhere have sat and laughed at them until the tears ran down their faces.Even people who don't understand English can enjoy Chaplin's films though most of them are silent.It isn't what he says that makes people laugh.His comedy doesn't depend upon words and languages.It depends upon little actions which mean the same thing to people all over the world.Acting out,without words,common human situations play an important part in the dances and plays of many countries.It's a kind of world language. Chaplin lived most of his life in America and died in Switzerland on Christmas Day,1977,at the age of eightyeight.The world was astonished at the news of the death and burst into sadness.
Answer: Because he wanted to see the famous actors or actresses after the performance.

Answer:
Why was young Chaplin waiting outside the back entrance of the theatre?