Question: Which airport is mainly used for general aviation, Memphis International Airport or Sheridan County Airport?

<P0-S0> Memphis International Airport (IATA: MEM, ICAO: KMEM, FAA LID: MEM) is a civil-military airport seven miles (11.2 km) southeast of downtown Memphis in Shelby County, Tennessee, United States. <SEP> <P1-S0>  It is located two nautical miles (4 km) southwest of the central business district of Sheridan, Wyoming. <P1-S1>  The airport is mainly used for general aviation. <P1-S2> Sheridan County Airport (IATA: SHR, ICAO: KSHR, FAA LID: SHR) is a county owned, public use airport in Sheridan County, Wyoming, United States. <SEP> <P2-S0> Bishop International Airport (IATA: FNT, ICAO: KFNT, FAA LID: FNT) is a commercial and general aviation airport located in Flint, Michigan. <P2-S1>  It is named after banker and General Motors board member Arthur Giles Bishop (April 12, 1851 – January 22, 1944), who donated 220 acres of his farmland for the airport in 1928. <P2-S2>  The third busiest airport in Michigan, it surpassed competitor MBS International Airport in terms of airline operations in 2002. <P2-S3>  In 2007, 1,071,238 passengers used Bishop International Airport; in 2011, 938,914 passengers used the airport. <P2-S4>  It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a small hub primary commercial service facility. <P2-S5>  The airport is currently served by several passenger airlines: Allegiant Air, Southwest Airlines and Delta Air Lines operate mainline service out of the airport, as well as affiliates of Delta Connection, United Express and American Eagle. <P2-S6>  Additionally, FedEx Express and a FedEx Feeder affiliate operate cargo services out of the airport. <P2-S7>  Accompanying the airlines is fixed-base operator Av Flight that handles both general aviation and airline operations and the flight school American Wings Aviation. <P2-S8>  Bishop International Airport is in southwestern Flint, and is surrounded by Flint Township to the north, east and west; and Mundy Township to the south. <SEP> <P3-S0> Rumbula (ICAO: EVRC) is an air base located 11 km southeast of Riga city centre in Latvia. <P3-S1>  The airfield had military use in the 1950s and 1960s. <P3-S2>  In the 1960s it was used as temporary passenger airport for bigger planes until the new Riga International Airport was opened in 1973. <P3-S3>  At least since 2001 there has been no military or commercial aviation based in Rumbula. <P3-S4>  Now it is mainly used as the biggest auto market in Latvia, and only about five small general aviation planes are based here. <P3-S5>  The runway is in very poor condition, with holes and concrete blocks often used to learn how to drive a car or for "test drives" of cars to be sold at the market. <P3-S6>  It is difficult to find a continuous whole and obstacle-free piece of the runway which is more than 3000m long. <P3-S7>  There are also a few "bomb-proof" camouflaged military hangars (one example is located at 56°53'08.39" N / 24°13'33.93" E). <P3-S8>  The hangars are mainly used as storage or general purpose facilities; they are not obvious on satellite images and are not freely accessible on the ground.