You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Cristóbal de Tapia was sent to investigate the conduct of the leader of an expedition that caused the fall of what?" whose answer is the Aztec Empire.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Cristóbal de Tapia expedition investigation
Useful Output:

Doc 1: Rodríguez Demorizi, 30–2, discusses the implications of the split between wealthy and poor for Cristóbal de Tapia's case. 19 Rodríguez
Doc 2: His enmity with the governor of Cuba, Diego Velázquez de Cuéllar, resulted in the recall of the expedition at the last moment, an order which Cortés ignored.
Doc 3: Cristóbal de Tapia was an inspector sent to New Spain in 1521 to investigate the conduct of the conquistador Hernán Cortés.
Doc 4: While his father Juan de Oñate, governor of New Mexico, was seeking a trail to the Pacific Ocean. (see Caso et al 2014), Cristóbal de Oñate was entrusted
Doc 5: Military and Civil Instruction to Francisco Cortes for the Expedition to Colima., 1. Letter of Motolinia to Emperor Charles V, January 2, 1555 · Tomo 1