Question: What is the date of death of the director of film Beneath The Valley Of The Ultra-Vixens?
Sentence (from "Valley of Mexico"): The valley used to contain five lakes called Lake Zumpango, Lake Xaltocan, Lake Xochimilco, Lake Chalco, and the largest, Texcoco covering about of the valley floor, but as the Spaniards expanded Mexico City, they began to drain the lakes' waters to control flooding.
Relevant evidence: No