Complex sentence: The Spanish missions of Béxar began in 1716 when Franciscan priest Antonio de Olivares encountered the Payaya tribe of Coahuiltecan people who became the first indigenous converts at San Antonio de Valero Mission on May 1 at San Pedro Springs.
Split into simpler sentences: The Spanish missions of Béxar began in 1716 when Franciscan priest Antonio de Olivares encountered the Payaya tribe of Coahuiltecan people. They became the first indigenous converts at San Antonio de Valero Mission on May 1 at San Pedro Springs.