Complex sentence: He formed part of a Spanish settler group from the Canary Islands who emigrated to San Antonio in 1731 for populate this region, being the leader and spokesman of the new settlers since they left the islands.
Split into simpler sentences: He formed part of a Spanish settler group from the Canary Islands who emigrated to San Antonio in 1731 for populate this region. He was the leader and spokesman of the new settlers since they left the islands.