In this task, we ask you to write an answer to a question that involves “event duration", based on a given sentence. Here, event duration is defined as the understanding of how long events typically last. For example, “brushing teeth”, usually takes a few minutes. Note that a lot of the questions could have more than one correct answer. We only need a single most-likely answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.

Example Input: Sentence: The previous numismatic record holder was an 1804 U.S. silver dollar, which sold for $4.14 million in 1999. 
Question: How long did the bidding last for the 1804 U.S. silver dollar?
Example Output: seven minutes.

Example Input: Sentence: The Shang Dynasty gave rise to the concept of one Chinese nation under one government. 
Question: How long did the Shang Dynasty last?
Example Output: for hundreds of years.

Example Input: Sentence: A statue, by James Earle Fraser, was dedicated on May 17, 1923, on the south terrace of the Treasury Building, in Washington. 
Question: How long did it take to make the statue?
Example Output:
a month.

