Question: What is the population of the city where KRVO is located?

Context paragraphs:
KRVO: KRVO is a commercial radio station in Columbia Falls, Montana, broadcasting to the Kalispell-Flathead Valley, Montana area on 103.1 FM.

Columbia Falls, Montana: Columbia Falls (Salish: nq̓éyɫkʷm) is a city in Flathead County, Montana, United States.  The population was 4,688 at the 2010 census.

Supporting paragraphs: KRVO Columbia Falls, Montana
Answer: 4,688