Question: Who was the first european to discover the mississippi river?

context: No context provided
question: Who was the first European to sail upriver the Mississippi River?
short_answers: Alonzo Alvarez de Pineda
context: While Hernando de Soto was the first European to make official note of the Mississippi River by discovering its southern entrance in 1541, Jolliet and Marquette were the first to locate its upper reaches, and travel most of its length, about 130 years later. De Soto had named the river Rio del Espiritu Santo, but tribes along its length called it variations "Mississippi", meaning "Great River" in the Algonquin languages.
question: Who was the first European person to discover the Mississippi River?
short_answers: Hernando de Soto

Answer: Alonzo Alvarez de Pineda, a Spanish explorer, became the first recorded European to reach the Mississippi River in 1519 and the first European to sail it upriver. However, Spanish explorer Hernando de Soto is credited as being the first European to discover it, being the first to make official note of the river when he discovered its southern entrance in 1541. Louis Jolliet, a French-Canadian explorer, and Jacques Marquette, a French missionary, were the first to locate its upper reaches and travel most of its length about 130 years later.