Question: What stake was held on June 6, 2015 that the American Thoroughbred racehorse Frosted attended?
Sentence (from "2015 Belmont Stakes"): The 1+1/2 mi race, known as the "test of the champion" and sometimes called the "final jewel" in thoroughbred horse racing's traditional Triple Crown series, was held on June 6, 2015, three weeks after the Preakness Stakes and five weeks after the Kentucky Derby.
Relevant evidence: No