Complex sentence: After its transfer to Newmarket, Suffolk in 1956, it was trained by Cecil Boyd-Rochfort winning the Ascot Stakes in 1956, and the Ascot Gold Cup in 1957, ridden by Lester Piggott in the first of his eleven wins of that race.
Split into simpler sentences: After its transfer to Newmarket, Suffolk in 1956, it was trained by Cecil Boyd-Rochfort winning the Ascot Stakes in 1956. In 1957, ridden by renowned jockey Lester Piggott, it won Ascot Gold Cup in the first of Piggott's eleven wins of that race.