Read the following premise and answer if the hypothesis is true.
Superior is a town in and the county seat of Mineral County, Montana, United States. The population was 812 at the 2010 census. Superior was named after its founders' hometown of Superior, Wisconsin in 1869. The post office was established in 1871 after Mineral County became the site of one of the largest gold strikes that helped settle the West.
Hypothesis: The gold rush only ocurred in the west of the usa. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say based on the given information. The information provided only mentions that Mineral County, Montana, where Superior is