Question:  Montrose Regional Airport a public airport as opposed to Luis Muñoz Marín International Airport which is what?

full_context: Document 1: Fernando Luis Ribas Dominicci Airport: Fernando Luis Ribas Dominicci Airport (IATA: SIG, ICAO: TJIG, FAA LID: SIG) , also commonly known as Isla Grande Airport, is a small airport in Miramar, which is a district in the municipality of San Juan, Puerto Rico. It is owned by the Puerto Rico Ports Authority and is adjacent to the new Puerto Rico Convention Center, the San Juan Bay, and the Pan American Cruise Ship Terminal, and overlooks Cataño. While Isla Grande's main operation is with general aviation, it is still a commercial airport, dealing with some domestic and international commercial flights.
Document 2: Grantley Adams International Airport: Grantley Adams International Airport (GAIA) (IATA: BGI, ICAO: TBPB) is the international airport of Barbados, located in Seawell, Christ Church. It is the only designated port of entry for persons arriving and departing by air in Barbados and operates as a major gateway to the Eastern Caribbean. The airport has direct service to destinations in the United States, Canada, Central America and Europe and serves as the second hub for LIAT. In 2016, the airport was the 8th busiest airport in the Caribbean region; and the third busiest airport in the Lesser Antilles; after Queen Beatrix International Airport located in Aruba, and Pointe-à-Pitre International Airport located in the Republic of France within the island of Guadeloupe. GAIA, also remains an important air-link for cruise ship passengers departing and arriving at the Port of Bridgetown, and a base of operations for the Regional Security System (RSS), and the Regional (Caribbean) Police Training Centre.
Document 3: Billings Logan International Airport: Billings Logan International Airport (IATA: BIL, ICAO: KBIL, FAA LID: BIL) is two miles northwest of downtown Billings, in Yellowstone County, Montana. It is the second largest airport in Montana, having been surpassed by Bozeman in both number of gates as well as annual enplanements in recent years, and is owned by the city of Billings. The airport is on top of the Rims, a 500 ft cliff overlooking the downtown core. BIL covers 2,300 acres (9.3 sq.km.) of land.
Document 4: Montrose Regional Airport: Montrose Regional Airport (IATA: MTJ, ICAO: KMTJ, FAA LID: MTJ) is a non-towered public airport on the northwest side of Montrose, in zip code 81401 in southwestern Colorado. Its two runways are at elevation 5,759 feet (1,755 m). MTJ covers 966 acres (391 ha) of land.
Document 5: Rafael Hernández Airport: Rafael Hernández Airport (IATA: BQN, ICAO: TJBQ, FAA LID: BQN) is a joint civil-military airport located in Aguadilla, Puerto Rico. It is named after the Puerto Rican composer Rafael Hernández Marín and is the second largest international airport in Puerto Rico in the region of Porta del Sol, Puerto Rico's west coast. It is also home to Coast Guard Air Station Borinquen. Rafael Hernandez Airport mainly serves Puerto Rican westerners living in the Eastern Region of the United States. The airport previously served as a focus city for PAWA Dominicana.
Document 6: Montrose Micropolitan Statistical Area: The Montrose Micropolitan Statistical Area is a United States Census Bureau defined Micropolitan Statistical Area located in the Montrose area of the State of Colorado. The Montrose Micropolitan Statistical Area is defined as Montrose County, Colorado. The Micropolitan Statistical Area had a population of 33,432 at the 2000 Census. A July 1, 2009 U.S. Census Bureau estimate placed the population at 41,412.
Document 7: Luis Muñoz Marín International Airport: Luis Muñoz Marín International Airport (IATA: SJU, ICAO: TJSJ, FAA LID: SJU) (Spanish: "Aeropuerto Internacional Luis Muñoz Marín" , Or Isla Verde International Airport/Aeropuerto Internacional de Isla Verde) is a joint civil-military international airport named for Puerto Rico's first democratically elected governor and located in suburban Carolina, Puerto Rico, 3 mi southeast of San Juan. It is the busiest airport in the Caribbean region by passenger traffic. Over 4 million passengers board a plane at the airport per year according to the Federal Aviation Administration.
Document 8: Piarco International Airport: Piarco International Airport (IATA: POS, ICAO: TTPP) , and frequently shortened to Piarco International, Piarco Airport, or simply Piarco; is an international airport serving the island of Trinidad and is one of two international airports in Trinidad and Tobago. The airport is located 30 km east of Downtown Port of Spain, located in the adjacent town of Piarco. It is the seventh busiest airport in the Caribbean in terms of passengers served and third busiest in the English-speaking Caribbean, after Sangster International Airport and Lynden Pindling International Airport. The airport is also the primary hub and operating base for the country's national airline, as well as the Caribbean's largest airline, Caribbean Airlines.
Document 9: Luis Muñoz Marín International Airport: Luis Muñoz Marín International Airport (IATA: SJU, ICAO: TJSJ, FAA LID: SJU) (Spanish: "Aeropuerto Internacional Luis Muñoz Marín" , Or Isla Verde International Airport/Aeropuerto Internacional de Isla Verde) is a joint civil-military international airport named for Puerto Rico's first democratically elected governor and located in suburban Carolina, Puerto Rico, 3 mi southeast of San Juan. It is the busiest airport in the Caribbean region by passenger traffic. Over 4 million passengers board a plane at the airport per year according to the Federal Aviation Administration.
Document 10: Roswell International Air Center: Roswell International Air Center (RIAC) (IATA: ROW, ICAO: KROW, FAA LID: ROW) (Roswell Industrial Air Center) is an airport seven miles (11 km) south of Roswell, in Chaves County, New Mexico.
Document 11: Mineral County Airport: Mineral County Airport (FAA LID: 9S4) is a county-owned public-use airport located two nautical miles (3.7 km) southeast of the central business district of Superior, a town in Mineral County, Montana, United States. According to the FAA's National Plan of Integrated Airport Systems for 2011-2015, it is categorized as a "general aviation" facility.
Document 12: Rocky Mountain Metropolitan Airport: Rocky Mountain Metropolitan Airport (IATA: BJC, ICAO: KBJC, FAA LID: BJC) is a public-use airport located near Broomfield, Colorado, United States. The airport is owned and operated by Jefferson County and is situated midway between Denver and Boulder on U.S. Highway 36. It is located sixteen miles northwest of the central business district of Denver, and is the closest airport to downtown Denver. The airport covers 1700 acre and has three runways. Formerly known as Jefferson County Airport or Jeffco Airport, the airport was renamed Rocky Mountain Metropolitan Airport on October 10, 2006 although it is sometimes referred to as Rocky Mountain Regional Airport, e.g. 2007-2012 county planning documents.
Document 13: Colorado City Municipal Airport: Colorado City Municipal Airport (ICAO: KAZC, FAA LID: AZC) is a general aviation airport located three miles (5 km) southwest of the central business district of Colorado City, in Mohave County, Arizona, United States. The airport is not served by any commercial airlines at this time. There are twelve aircraft based at the field.
Document 14: Eagle County Regional Airport: Eagle County Regional Airport (IATA: EGE, ICAO: KEGE, FAA LID: EGE) (Vail/Eagle Airport or the Eagle Vail Airport) is four miles (6 km) west of Eagle, Colorado. The airport serves its namesake Eagle County, which includes visitors to the nearby Vail and Beaver Creek ski resorts. It covers 632 acre and has one runway. The History Channel rated Eagle County Regional Airport as #8 on its list of Most Extreme Airports in July, 2010 due to the elevation, weather variability, an approach through mountainous terrain and challenging departure procedures. In 2008–2009, the Airport completed a runway repaving and extension project, increasing the runway length to 9,000 feet.
Document 15: Air Caribbean (Puerto Rico): Air Caribbean was an airline that served from Luis Muñoz Marín International Airport, then "Isla Verde International Airport", in San Juan. The 1970s and 1980s were decades when several Puerto Rican airlines existed and competed against each other, including Prinair, Vieques Air Link and Dorado Wings. Believing a share of the market profits could be gained, Air Caribbean was created in 1975.
ground_truth: joint civil-military international airport