Question: What nationality was the leader of the expedition that Juan de Zubileta began on August 10, 1519?
Sentence (from "Ferdinand Magellan"): Ferdinand Magellan ( or ; Portuguese: "Fernão de Magalhães" , ] ; Spanish: "Fernando de Magallanes" , ] ; c. 1480 – 27 April 1521) was a Portuguese explorer who organised the Spanish expedition to the East Indies from 1519 to 1522, resulting in the first circumnavigation of the Earth, completed by Juan Sebastián Elcano.
Relevant evidence: Yes