What was the population in 2015 of the city in which Rollin Prather was born ? 
Rollin Prather:  Born in Eureka, Kansas, the son of Raymond Lealand and Irene (Bailey) Prather, he previously played football at and attended Kansas State University, graduating with a Bachelor of Science degree in geology. Eureka, Kansas:  As of the 2010 census, the city population was 2,633, the 2015 census estimate declined to 2,450.
2,450