The task is about reading the given story and question, then finding an answer to the given question. Based on the passage provided and the given question, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Ex Input:
story: Karachi (; ALA-LC: , ; ) is the capital of the Pakistani province of Sindh. It is the most populous city in Pakistan, sixth most populous city proper in the world and the 8th most populous metropolitan city in the world. Ranked as a beta world city, the city is Pakistan's premier industrial and financial centre. Karachi is also Pakistan's most cosmopolitan city. Situated on the Arabian Sea, Karachi serves as a transport hub, and is home to two of Pakistan's two largest seaports, the Port of Karachi and Port Bin Qasim, as well as the busiest airport in Pakistan.

Though the Karachi region has been inhabited for millennia, the city was founded as a fortified village named "Kolachi" in 1729. The settlement drastically increased in importance with the arrival of British East India company in the mid 19th century, who not only embarked on major works to transform the city into a major seaport, but also connected it with their extensive railway network. By the time of the Partition of British India, the city was the largest in Sindh with an estimated population of 400,000. Following the independence of Pakistan, the city's population increased dramatically with the arrival of hundreds of thousands of Muslim refugees from India. The city experienced rapid economic growth following independence, attracting migrants from throughout Pakistan and South Asia., question: When did the population increase?

Ex Output:
Following the independence of Pakistan

Ex Input:
story: CHAPTER XXXVI.

TOM TRINGLE GETS AN ANSWER.

Faddle as he went down into the country made up his mind that the law which required such letters to be delivered by hand was an absurd law. The post would have done just as well, and would have saved a great deal of trouble. These gloomy thoughts were occasioned by a conviction that he could not carry himself easily or make himself happy among such "howling swells" as these Alburys. If they should invite him to the house the matter would be worse that way than the other. He had no confidence in his dress coat, which he was aware had been damaged by nocturnal orgies. It is all very well to tell a fellow to be as "big a swell" as anybody else, as Tom had told him. But Faddle acknowledged to himself the difficulty of acting up to such advice. Even the eyes of Colonel Stubbs turned upon him after receipt of the letter would oppress him.

Nevertheless he must do his best, and he took a gig at the station nearest to Albury. He was careful to carry his bag with him, but still he lived in hope that he would be able to return to London the same day. When he found himself within the lodges of Stalham Park he could hardly keep himself from shivering, and, when he asked the footman at the door whether Colonel Stubbs were there, he longed to be told that Colonel Stubbs had gone away on the previous day to some--he did not care what--distant part of the globe. But Colonel Stubbs had not gone away. Colonel Stubbs was in the house. , question: What was the answer?

Ex Output:
Colonel Stubbs was in the house.

Ex Input:
story: I'm writing this letter slowly because I know you can't read fast. We don't live where we did when you left home. Your dad read in the newspaper that most accidents happened within 20 miles from our home, so we moved.

I won't be able to send you the address because the last family that lived here took the house numbers when they moved so that they wouldn't have to change their address. This place is really nice. It even has a washing machine. I'm not sure it works so well though: last week I put a load in and pulled the chain and haven't seen them since. The weather isn't bad here. It only rained twice last week; the first time for three days and the second time for four days. About that coat you wanted me to send you, your uncle Stanley said it would be too heavy to send in the mail with the buttons on so we cut them off and put them in the pockets.

John locked his keys in the car yesterday. We were really worried because it took him two hours to get me and your father out. Your sister had a baby this morning, but I haven't found out what _ is yet. The baby looks just like your brother.

Uncle Ted fell in a whiskey vat last week. Some men tried to pull him out, but he fought them off playfully and drowned. We had him cremated and he burned for three days.

Three of your friends went off a bridge in a pick-up trunk. Ralph was driving. He rolled down the window and swam to safety. You other two friends were in back. They drowned because they couldn't get the tail gate down.

There isn't much more news at this time. Nothing much has happened.

Love,

Mom

P.S. I was going to send you some money but the envelope was already sealed., question: What did they do before they sent it?

Ex Output:
cut the buttons off