premise: Gelston is a village in the South Kesteven district of Lincolnshire, England. It is situated 2 mi west from the A607 road, 5 mi north from Grantham, and in the civil parish of Hough-on-the-Hill, a village 1 mi to the north-east. It is in the civil parish of Brant Broughton and Stragglethorpe.
hypothesis: Gelston is southwest of Hough-on-the-Hill.
reason: The text tells us Hough-on-the-Hill is a village 1 mi to the north-east of Gelston, so Gelston is southwest of Hough-on-the-Hill; the algorithm didn't know to reverse the direction.