What is the highest ranked non-human on ESPN's 1999 list of 'Top 50 Athletes of the 20th Century'?
Secretariat, who in 1973 became the first Triple Crown champion in twenty-five years
secretariat who in 1973 became first triple crown champion in twenty five years
secretariat who in 1973 became first triple crown champion in twenty five years
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Secretariat, who in 1973 became the first Triple Crown champion in twenty-five years