Definition: 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.
Input: Article: Before Alaska became part of the U.S., it had been owned by Russia. Trading posts and small settlements were scattered along the coast. The rest of land was left unexplored. The Russians were mainly interested in the wealth of furs from the vast herds of seals they found there. By the mid-1800's, most of the seal herds had been wiped out, and Russia no longer wanted to keep Alaska. William Seward, Secretary of State for President Johnson, believed the United States should buy Alaska from Russia. President Johnson wasn't so sure it was a wise way to spend U.S. money, but he agreed to let Seward discuss it with the Russians. Acting quickly, Seward made a deal. On March 30, 1867, he signed an agreement for the U.S. to pay seven million dollars for the land. Many people thought it was a foolish waste of America's money. They called the deal "Seward's folly". Then gold was discovered in Alaska and public opinion changed quickly. Seward did not live to see the true value of Alaska. He died in 1872, five years after making the purchase . Each year, Alaska's natural resources have brought in many times the $7,000,000 paid for it. Natural gas, coal, oil, lumber, seafood and other minerals, besides the gold first found, have made it a valuable addition to the United States. In 1959, Alaska be-came the 49th state of the United States.
Answer: they wanted to earn more money from the U.S.
Output:
The Russians wanted to sell Alaska because _ .