Task: Explanation
Input (English): Golden is the Home Rule Municipality that is the county seat of Jefferson County, Colorado, United States. Golden lies along Clear Creek at the base of the Front Range of the Rocky Mountains. Founded during the Pike's Peak Gold Rush on 16 June 1859, the mining camp was originally named Golden City in honor of Thomas L. Golden. Golden City served as the capital of the provisional Territory of Jefferson from 1860 to 1861, and capital of the official Territory of Colorado from 1862 to 1867. In 1867, the territorial capital was moved about 12 mi east to Denver City. The United States Census Bureau estimates that the city population was 18,867 in 2010. Question:  Boston Market Corporation is a chain of American fast casual restaurants headquartered in a municipality founded on 16 June 1859 during what? Answer: the Pike's Peak Gold Rush
Output (English): Golden is the Home Rule Municipality that is the county seat of Jefferson County, Colorado, United States.