Question: Which of both airports; Eugene Airport and Merle K. Smith Airport, is located farther from its closest city? 
Sentence (from "Eugene Airport"): Eugene Airport (IATA: EUG, ICAO: KEUG, FAA LID: EUG) , also known as Mahlon Sweet Field, is a public airport 7 miles (11 km) northwest of Eugene, in Lane County, Oregon.
Relevant evidence: Yes