Original sentence: 1421 Esperanto (1936 FQ) is a Main-belt Asteroid discovered on March 18, 1936 by Vaisala, Y.at Turku
Edited sentence: 1421 Esperanto (1936 FQ) is a main-belt asteroid discovered on March 18, 1936 by the Finnish astronomer Yrjö Väisälä at Turku.Väisälä Institute for Space Physics and Astronomy