Question: A United Nations Secretary-General selection was held in 1971 to replace U Thant, three candidates received how many votes, required in the Security Council to be selected Secretary-General, one being Kurt Waldheim, he was the fourth Secretary-General of the United Nations from 1972 to 1981, and the ninth President of Austria from 1986 to 1992?
Sentence (from "United Nations Secretary-General selection, 1971"): However, all of the frontrunners were vetoed in the first two rounds of voting.
Relevant evidence: No