Complex sentence: Governor Treviño, frightened, in exchange for regaining his freedom, freed the remaining Pueblos, including one named Popé who, after his release, began planning a revolt against the Spanish (held on August 11,1680).
Split into simpler sentences: Governor Treviño, frightened, freed the imprisoned Pueblos in exchange for regaining his freedom. Among the Pueblos released had one named Popé who, after his release, began planning a revolt against the Spanish (held on August 11,1680).