Input (grade 13): Friedrich Wilhelm Heinrich Alexander Freiherr von Humboldt (September 14, 1769 - May 6, 1859) was a German naturalist and explorer, and the younger brother of the Prussian minister, philosopher and linguist Wilhelm von Humboldt (1767 â "1835).
Output (grade 10): Alexander von Humboldt (Berlin, 14 September 1769 â "Berlin, 6 May 1859) was a Prussian naturalist and explorer.