Information:  - At the end of each Major League Baseball season, the league leaders of various statistical categories are announced. Leading the league in a particular category is referred to as a "title".  - An independent baseball league is a professional baseball organization located in the United States and Canada that is not operated in conjunction with either a Major League Baseball team or an affiliated Minor League Baseball team. Being independent allows teams to be located close to major league teams without their consent. Such leagues have been around for many years and were once known as "outlaw leagues" due to their position outside the rules of affiliated minor league baseball.  - The New YorkPenn League is a minor league baseball league which operates in the northeastern United States. It is classified as a Class A Short Season league; its season starts in June, after major league teams have signed their amateur draft picks to professional contracts, and ends in early September.   - The Northeast megalopolis (also BostonWashington Corridor or Bos-Wash Corridor) is the most heavily urbanized region of the United States, running primarily northeast to southwest from the northern suburbs of Boston, Massachusetts, to the southern suburbs of Washington, D.C., in Northern Virginia. It includes the major cities of Boston, New York City, Philadelphia, Baltimore, and Washington, D.C., along with their metropolitan areas and suburbs as well as many smaller urban centers.  - Clarence Miles (June 29, 1897  October 8, 1977) was the chairman of the board and president of the Baltimore Orioles of the American League during the and seasons.  - Byron Bancroft "Ban" Johnson (January 5, 1864  March 28, 1931) was an American executive in professional baseball who served as the founder and first president of the American League (AL).  - Maryland is a state located in the Mid-Atlantic region of the United States, bordering Virginia, West Virginia, and Washington, D.C. to its south and west; Pennsylvania to its north; and Delaware to its east. The state's largest city is Baltimore, and its capital is Annapolis. Among its occasional nicknames are "Old Line State", the "Free State", and the "Chesapeake Bay State". The state is named after Henrietta Maria of France, the wife of Charles I of England.   - The American League of Professional Baseball Clubs, or simply the American League (AL), is one of two leagues that make up Major League Baseball (MLB) in the United States and Canada. It developed from the Western League, a minor league based in the Great Lakes states, which eventually aspired to major league status. It is sometimes called the Junior Circuit because it claimed Major League status for the 1901 season, 25 years after the formation of the National League (the "Senior Circuit").  - The New York Yankees are an American professional baseball team based in the New York City borough of the Bronx. The Yankees compete in Major League Baseball (MLB) as a member club of the American League (AL) East division. The Yankees are one of two Major League clubs based in New York City; the other is the New York Mets. The club began play in the AL in the season as the Baltimore Orioles (not to be confused with the modern Baltimore Orioles.) Frank Farrell and Bill Devery purchased the franchise (which had ceased operations) and moved it to New York City, renaming the club as the New York Highlanders. The Highlanders were officially renamed as the "Yankees" in .  - Milwaukee is the largest city in the state of Wisconsin and the fifth-largest city in the Midwestern United States. The county seat of Milwaukee County, it is on Lake Michigan's western shore. Milwaukee's estimated population in 2015 was 600,155. Milwaukee is the main cultural and economic center of the MilwaukeeRacineWaukesha Metropolitan Area with an estimated population of as of 2014. Ranked by estimated 2014 population, Milwaukee is the 31st largest city in the United States.  - Texas is the second largest state in the United States by both area and population. Geographically located in the south central part of the country, Texas shares borders with the U.S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the southwest, while the Gulf of Mexico is to the southeast.  - The Aberdeen IronBirds are a Short-Season A classification affiliate of the Baltimore Orioles. The IronBirds play in the New YorkPenn League and are based in the city of Aberdeen in Harford County, Maryland.  - The Baltimore Orioles are an American professional baseball team based in Baltimore, Maryland. The Orioles compete in Major League Baseball (MLB) as a member of the American League (AL) East division. One of the AL's eight charter franchises when the league was established in 1901 with President Ban Johnson, this particular franchise spent its first year as a major league club in Milwaukee, Wisconsin as the Milwaukee Brewers before moving to St. Louis, Missouri to become the St. Louis Browns. After 52 often-beleaguered years in St. Louis, the franchise was purchased in November 1953 by Baltimore business interests led by Clarence Miles. The franchise officially moved to Baltimore for the 1954 season and adopted the historic "Orioles" name in honor of the official state bird of Maryland. The Orioles name had also been used by several previous major and minor league baseball clubs in Baltimore, including the franchise that would eventually become the New York Yankees. Nicknames for the team include the "O's" and the "Birds".  - The Aberdeen Arsenal was an Atlantic League team based in Bel Air , Maryland . For the 2000 season , they played in the Atlantic League of Professional Baseball , which was not affiliated with Major League Baseball . The Arsenal departed from Aberdeen to make room for the Aberdeen IronBirds , the A affiliate of the Baltimore Orioles owned by Cal Ripken , Jr. The Arsenal played at Thomas Run Park , on the campus of Harford Community College . The Arsenal are the subject of NPR broadcaster Neal Conan 's book , Play By Play : Baseball , Radio , and Life in the Last Chance League .  - Baseball is a bat-and-ball game played between two teams of nine players each, who take turns batting and fielding.  - The Atlantic League of Professional Baseball is a professional, independent baseball league located primarily in the Mid-Atlantic and Northeastern United States, especially the greater metropolitan areas of the Northeast megalopolis, with one team located in Texas.   - Harford County is a county in the U.S. state of Maryland. As of the 2010 census, the population was 244,826. Its county seat is Bel Air.    What entity does 'aberdeen arsenal' has the relation 'instance of' with?
The answer to this question is:
baseball team