Question: The Ford Explorer and the Mercury Mountaineer are very similar vehicles. What year did the Ford Explorer start being produced?
Sentence (from "Ford Explorer"): The model years 1991 through 2010 were traditional body-on-frame, mid-size SUVs. For the 2011 model year, Ford moved the Explorer to a more modern unibody, full-size crossover SUV platform, the same Volvo-derived platform the Ford Flex and Ford Taurus use although with significantly greater ground clearance.
Relevant evidence: No