Question: Which airport is located in the state of Maine, Portland International Jetport or Muskegon County Airport?
Sentence (from "Muskegon County Airport"): Muskegon County Airport (IATA: MKG, ICAO: KMKG, FAA LID: MKG) is a county owned, public use airport in Muskegon County, Michigan, United States.
Relevant evidence: Yes