Question: How long is the river that begins 40 mi southwest of the county seat of Beltrami County?
Sentence (from "Otter Tail River"): It then flows through a number of lakes and cities in Minnesota, including Elbow Lake, Many Point Lake, Chippewa Lake, Height of Land Lake, Frazee, the Pine lakes, Rush Lake, Otter Tail Lake and Ottertail, West Lost Lake, Fergus Falls, and Orwell Lake.
Relevant evidence: No