Information:  - Uruguay, officially the Oriental Republic of Uruguay, is a country in the southeastern region of South America. It borders Argentina to its west and Brazil to its north and east, with the Río de la Plata (River of Silver) to the south and with the Atlantic Ocean to the southeast. Uruguay is home to an estimated 3.42 million people, of whom 1.8 million live in the metropolitan area of its capital and largest city, Montevideo. With an area of approximately , Uruguay is geographically the second-smallest nation in South America, only larger in size than Suriname.  - Avenida 18 de Julio, or 18 de Julio Avenue, is the most important avenue in Montevideo, Uruguay. It is named after the date the first Constitution of Uruguay was written: July 18, 1830.  - The Americas, also collectively called America, encompass the totality of the continents of North America and South America. Together they make up most of Earth's western hemisphere and comprise the "New World".   - Puerta de la Ciudadela ( Gateway of the Citadel ) , or simply Ciudadela is one of the few remaining parts of the wall that surrounded the oldest part of the city of Montevideo , the citadel , which was torn down in 1829 . It is located by Plaza Independencia , in Ciudad Vieja .  - Plaza Independencia (Spanish for Independence Square) is the name of Montevideo's most important plaza. It separates Ciudad Vieja from downtown Montevideo, with the Gateway of The Citadel on one side and the beginning of 18 de Julio avenue on the other.  - Montevideo is the capital and largest city of Uruguay. According to the 2011 census, the city proper has a population of 1,319,108 (about one-third of the country's total population) in an area of . The southernmost capital city in the Americas, Montevideo is situated in the southern coast of the country, on the northeastern bank of the Río de la Plata.  - The Río de la Plata ("River of Silver")  rendered River Plate in British English and the Commonwealth and La Plata River (occasionally Plata River) in other English-speaking countries  is the river and estuary formed by the confluence of the Uruguay and the Paraná rivers. It empties into the Atlantic Ocean, forming a funnel-shaped indentation on the southeastern coastline of South America.    What is the relationship between 'ciudadela' and 'uruguay'?
Ans: country

Information:  - Pennsylvania (Pennsylvania German: "Pennsylvaani"), officially the Commonwealth of Pennsylvania, is a state located in the northeastern and Mid-Atlantic regions of the United States. The Appalachian Mountains run through its middle. The commonwealth borders Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Lake Erie and the Canadian province of Ontario to the northwest, New York to the north, and New Jersey to the east.  - Canada (French: ) is a country in the northern half of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering , making it the world's second-largest country by total area and the fourth-largest country by land area. Canada's border with the United States is the world's longest land border. The majority of the country has a cold or severely cold winter climate, but southerly areas are warm in summer. Canada is sparsely populated, the majority of its land territory being dominated by forest and tundra and the Rocky Mountains. About four-fifths of the country's population of 36 million people is urbanized and live near the southern border. Its capital is Ottawa, its largest city is Toronto; other major urban areas include Montreal, Vancouver, Calgary, Edmonton, Quebec City, Winnipeg and Hamilton.  - The O'Reilly Theater is a 650-seat theater building, opened on December 11, 1999, in Pittsburgh, Pennsylvania. Located at 621 Penn Avenue in downtown Pittsburgh's Cultural District, the O'Reilly Theater is actually a three-part building: The theater (with a 150-seat rehearsal hall), a large parking garage called Theater Square, and the adjacent Agnes R. Katz Plaza.  - Downtown Pittsburgh, colloquially referred to as the Golden Triangle and officially the Central Business District, is the urban downtown center of Pittsburgh. It is located at the confluence of the Allegheny River and the Monongahela River whose joining forms the Ohio River. The "triangle" is bounded by the two rivers. The area features offices for major corporations such as PNC Bank, U.S. Steel, PPG, Bank of New York Mellon, Heinz, Federated Investors and Alcoa. It is where the fortunes of such industrial barons as Andrew Carnegie, Henry Clay Frick, Henry J. Heinz, Andrew Mellon and George Westinghouse were made. It contains the site where the French fort, Fort Duquesne, once stood.  - An artistic director is the executive of an arts organization, particularly in a theatre company, who handles the organization's artistic direction. They are generally a producer and director, but not in the sense of a mogul, since the organization is generally a non-profit organization. The artistic director of a theatre company is the individual with the overarching artistic control of the theatre's production choices, directorial choices, and overall artistic vision. In smaller theatres, the artistic director may be the founder of the theatre and the primary director of its plays. In larger non-profit theatres (often known in Canada and the United States as regional theatres), the artistic director may be appointed by the board of directors.  - Pittsburgh Public Theater , located in Pittsburgh , Pennsylvania , is a professional theater company . Led by Producing Artistic Director Ted Pappas and a board of trustees , Pittsburgh Public annually produces a six - play subscription series that mixes classics , works from Broadway , and musicals . Pittsburgh Public Theater has been in continuous operation since 1975 , first on Pittsburgh 's North Side and since 1999 in the O'Reilly Theater , in the heart of Downtown 's Cultural District .  - A board of directors is a body of elected or appointed members who jointly oversee the activities of a company or organization, which can include a non-profit organization or a government agency or corporation. A board of directors' activities are determined by the powers, duties, and responsibilities delegated to it or conferred on it by an authority outside itself. These matters are typically detailed in the organization's constitution and bylaws. These documents commonly also specify the number of members of the board, how they are to be chosen, and how often they are to meet. However, the constitution and bylaws rarely address a board's powers when faced with a corporate turnaround, restructuring, or emergencies, where board members need to act as agents of change in addition to their traditional fiduciary responsibilities.    What is the relationship between 'pittsburgh public theater' and 'theatre company'?
Ans: instance of