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?
Sentence (from "New York Stock Exchange"): The main building and the 11 Wall Street building were designated National Historic Landmarks in 1978.
Relevant evidence: No