Question: Which large pre-Columbian archaeological site is the major Zapotec regional center?
Sentence (from "El Palmillo"): El Palmillo is a Mesoamerican Classic Period archaeological site located in the Valley of Oaxaca, associated with the pre-Columbian Zapotec civilization which was centered in the valley and the surrounding highlands of the present-day state of Oaxaca, Mexico.
Relevant evidence: No