Complex sentence: The piece has no connection to the War of 1812 between the United States and Britain, but was personally conducted by Tchaikovsky in 1891 at the opening of Carnegie Hall in New York City.
Split into simpler sentences: The piece has no connection to the War of 1812 between the United States and Britain. It was personally conducted by Tchaikovsky in 1891 at the opening of Carnegie Hall in New York City.