Question: Walter Thane Baker was born in a city with a population of what as of the 2010 census?
Sentence (from "Thane Baker"): Walter Thane Baker (born October 4, 1931 in Elkhart, Kansas) is an American former sprinter and winner of the gold medal in the 4x100 m relay at the 1956 Summer Olympics in Melbourne, Australia, with a new world record of 39.5 seconds.
Relevant evidence: Yes