Task: Explanation
Input (English): Gregory Richard Gianforte (born April 17, 1961) is an American businessman, engineer, and politician who is the U.S. Representative for Montana's at-large congressional district. On May 25, 2017, he won the special election following Rep. Ryan Zinke's resignation to become Secretary of the Interior. Gianforte and his wife founded RightNow Technologies, a customer relationship management software company. Question: How long did Greg Gianforte's predecessor serve as U.S. representative for Montana's at-large congressional district? Answer: 2015 until 2017
Output (English):  On May 25, 2017, he won the special election following Rep. Ryan Zinkes resignation to become Secretary of the Interior.