question: What is the purpose of the Three Gorges Dam ?
answer: to control flooding in the Sichuan Basin , neighboring Yunnan province , and downstream
turker_answer: The purpose of the Three Gorges Dam was to control flooding in the Sichuan Basin , neighboring Yunnan province , and downstream .
rule-based: The purpose of the Three Gorges Dam is to control flooding in the Sichuan Basin , neighboring Yunnan province , and downstream .