Williston Municipal Airport (FAA LID: X60) is a city-owned, public-use airport located two nautical miles (4 km) southwest of the central business district of Williston, a city in Levy County, Florida, United States. Commonly referred to as Williston Airport, it is located 23 mi southwest of Gainesville Regional Airport (GNV). Opened in 1974 for public use, it does not have a control tower.
Gainesville Regional Airport (GNV) was opened in 1975.
It's never mentioned when Gainesville Regional Airport (GNV) was opened, only when  Williston Municipal Airport was opened. It's difficult because the text contains these phrases very close together so this easily tricks the system.