Question: Élan Corporation plc was a major drugs firm based in Dublin, Ireland, which had major interests in the United States, it was listed on which American stock exchange located at 11 Wall Street, Lower Manhattan, New York City, New York, as ELN?
Context: The economy of New York City encompasses the largest municipal as well as regional economy in the United States.  Anchored by Wall Street, in Lower Manhattan, New York City has been characterized as the world's premier financial center, and is home to the New York Stock Exchange and NASDAQ, the world's largest stock exchanges by market capitalization and trading activity.  In 2012, the New York City Metropolitan Statistical Area generated a gross metropolitan product (GMP) of over US$1.33 trillion, while the Combined Statistical Area produced a GMP of over US$1.55 trillion, both ranking first nationally by a wide margin and being roughly equivalent to the GDP of South Korea.  The city's economy accounts for the majority of the economic activity in the states of New York and New Jersey. The Stock Exchange of Hong Kong Limited (SEHK) is a stock exchange located in Hong Kong.  It is East Asia's and Asia's third largest stock exchange in terms of market capitalization behind the Tokyo Stock Exchange and Shanghai Stock Exchange, and the sixth largest in the world before Euronext.  As of 31 October 2016, SEHK had 1,955 listed companies, 989 of which are from mainland China, 856 from Hong Kong and 110 from abroad (e.g. Taiwan, Malaysia, United States, Singapore, etc.) Hong Kong Exchanges and Clearing owns SEHK and is itself listed on SEHK. Nasdaq, Inc. is an American multinational financial services corporation that owns and operates (and is listed on) the NASDAQ (formerly National Association of Securities Dealers Automated Quotations) stock market and eight European stock exchanges, namely Armenian Stock Exchange, Copenhagen Stock Exchange, Helsinki Stock Exchange, Iceland Stock Exchange, Riga Stock Exchange, Stockholm Stock Exchange, Tallinn Stock Exchange, and NASDAQ OMX Vilnius.  It is headquartered in New York City, and its president and chief executive officer is Adena Friedman. The Financial District, also known as FiDi, is a neighborhood located at the southern tip of the borough of Manhattan in New York City, which comprises the offices and headquarters of many of the city's major financial institutions, including the New York Stock Exchange and the Federal Reserve Bank of New York.  Anchored on Wall Street in the Financial District, New York City has been called both the most financially powerful city and the leading financial center of the world, and the New York Stock Exchange is the world's largest stock exchange by total market capitalization.  Several other major exchanges have or had headquarters in the Financial District, including the New York Mercantile Exchange, NASDAQ, the New York Board of Trade, and the former American Stock Exchange. The New York Stock Exchange (abbreviated as NYSE and nicknamed "The Big Board"), is an American stock exchange located at 11 Wall Street, Lower Manhattan, New York City, New York.  It is by far the world's largest stock exchange by market capitalization of its listed companies at US$21.3 trillion as of June 2017.  The average daily trading value was approximately 169 billion in 2013.  The NYSE trading floor is located at 11 Wall Street and is composed of 21 rooms used for the facilitation of trading.  A fifth trading room, located at 30 Broad Street, was closed in February 2007.  The main building and the 11 Wall Street building were designated National Historic Landmarks in 1978. Pier 11/Wall Street is a pier providing slips to ferries and excursion boats on the East River in the Port of New York and New Jersey.  It is located east of South Street and FDR Drive just south of Wall Street in Lower Manhattan, New York City.  The ferry terminal has five landings (A, B, C, D, E), each with two berths, and is used by four privately owned companies.  Within walking distance, public transportation includes the New York City Subway's trains at South Ferry – Whitehall Street and trains trains at Wall Street; the M55, M15, M15 SBS, M20 New York City Bus routes, and the Staten Island Ferry. Élan Corporation plc was a major drugs firm based in Dublin, Ireland, which had major interests in the United States.  It was listed on the New York Stock Exchange as ELN, the Irish Stock Exchange as ELN.I, and the London Stock Exchange as ELN.L.  In 2013, the company merged with Perrigo to form Perrigo Company PLC. The Stock Exchange Luncheon Club was a members-only dining club, on the seventh floor of the New York Stock Exchange (NYSE) at 11 Wall Street in Manhattan.  The club was founded on August 3, 1898, and moved from 70 Broadway to 11 Wall Street in 1903.  It closed on April 28, 2006, after more than a century of service. China Concepts Stock is a set of stock of companies whose assets or earnings have significant activities in mainland China.  The People's Republic of China is undergoing major financial transformation, and many leading mainland-based companies have chosen to list themselves overseas to gain access to foreign investor capital.  Currently, there are China Concepts Stocks listed on several major stock exchanges around the globe, including the Hong Kong Stock Exchange (HKEx), Singapore Exchange (SGX), New York Stock Exchange (NYSE), NASDAQ, NYSE MKT (formerly known as the American Stock Exchange), London Stock Exchange (LSE), Euronext, and the Tokyo Stock Exchange (TSE). The American Stock Exchange Building, formerly known as the New York Curb Exchange Building, is the former headquarters of the American Stock Exchange.  It is located on Trinity Place in the Financial District of Lower Manhattan, New York City.  Built in 1921 and enlarged in 1929-31, the building represents a link to the historical practices of stock trading outside the strictures of the New York Stock Exchange, which took place outside ("on the curb") prior to the construction of this building.  It was designated a National Historic Landmark in 1978.  The building presently stands vacant, the stock exchange having moved out after merging with the NYSE in 2008.
Answer: New York Stock Exchange