Question: Which contributor to Padrón Real was the first to demonstrate that Columbus' conjecture about Asia's eastern outskirts was wrong?
Sentence (from "Padrón Real"): Well known official cartographers and pilots who contributed to and used the map included Amerigo Vespucci, Diogo Ribeiro, Sebastian Cabot, Alonzo de Santa Cruz, and Juan Lopez de Velasco.
Relevant evidence: Yes