Complex sentence: Zimmerman, a native of Carsfeld, Saxony, unveiled his instrument at the 1849 Industrial Exhibition in Paris, the 1851 London Industrial Exposition, and the 1853 Exhibition of the Industry of All Nations in New York.
Split into simpler sentences: Zimmerman, a native of Carsfeld, Saxony, unveiled his instrument at the 1849 Industrial Exhibition in Paris, the 1851 London Industrial Exposition. The instrument was later shown at the 1853 Exhibition of the Industry of All Nations in New York.