Question: Which state-owned entity operates Norway's second-busiest airport, located just south of Grimstadfjorden?
Sentence (from "Bergen Airport, Flesland"): Bergen Airport, Flesland (Norwegian: "Bergen lufthavn, Flesland" ; IATA: BGO, ICAO: ENBR ) is an international airport located at Flesland in Bergen, a city and municipality in Hordaland county, Norway.
Relevant evidence: Yes