Input (grade 13): Nelson's Column is a monument in Trafalgar Square in central London built to commemorate Admiral Nelson, who died at the Battle of Trafalgar in 1805.
Output (grade 10): Nelson's Column is a national monument of the United Kingdom based in Trafalgar Square, London, England. The column was built between 1840 and 1843 to commemorate Admiral Horatio Nelson's death at the Battle of Trafalgar in 1805.