premise: Left Hand Spring was a well-known watering stop on the old Chisholm Trail in present-day Blaine County, Oklahoma. The spring was named for "Left Hand", an Arapaho chief. Jesse Chisholm died there in 1868 and is buried nearby. His grave is marked with a granite historical marker.
hypothesis: Left Hand Spring was a well-known watering stop in an Arapaho chief.
reason: I imagine a chief would be rather uncomfortable with a watering hole inside of him. System is unable to accurately determine context, and is instead  just looking for matching words and dates.