Complex sentence: He is approached by a man named Carlos Ortega, who informs him of Graboids killing his workers at Petromaya Oil Field, located in Sonora, Mexico, hoping to use Earl's experience to eliminate them.
Split into simpler sentences: He is approached by a man named Carlos Ortega, who informs him that Graboids are killing his workers at Petromaya Oil Field in Sonora, Mexico. He hopes to use Earl's experience to eliminate them.