He burst onto the scene in Australia last fall, winning three Group 1 races in six weeks and finishing third in the Melbourne Cup. Then, he conquered Ireland last month, winning two group stakes with ease.\r\nOn Wednesday, So You Think invades England, where the 5-year-old New Zealand-bred horse will be a heavy favorite to win the fifth Group 1 race of his career in the Prince of Wales&rsquo;s Stakes over 1 1/4 miles at Royal Ascot. The race carries a purse of approximately $650,000 and is the lone Group 1 on the six-race program.\r\nSo You Think, listed as a 1-2 chance with British bookmakers Monday, faces six rivals, five of whom are Group 1 winners. The race is so strong that Debussy, winner of the 2010 Arlington Million, is listed as a 66-1 outsider in his first start since a 15th-place finish in the $5 million Dubai Duty Free Stakes in Dubai in March.\r\nSo You Think, trained by Aidan O&rsquo;Brien, won the Group 3 Mooresbridge Stakes by 10 lengths at The Curragh in Ireland on May 2 and won the Group 1 Tattersalls Gold Cup over 1 5/16 miles by 4 1/2 lengths May 22. Ryan Moore rode So You Think in the Tattersalls Gold Cup and has the mount Wednesday.\r\nPlanteur, runner-up in the 2010 French Derby and unbeaten in two starts this year, is considered the main threat to So You Think. Trained by Elie Lellouche, Planteur won the Group 1 Prix Ganay in Paris on April 30, his most recent start and third career stakes win.\r\nThe field also includes Twice Over, winner of the 2010 Champion Stakes in England who was third in the 2009 Breeders&rsquo; Cup Classic at Santa Anita, as well as the Group 1 winners Rewilding and Jan Vermeer and the longshot Sri Putra.\r\nLater on the program, Kentucky-based trainer Wesley Ward starts Gypsy Robin in the Group 2 Queen Mary Stakes over five furlongs for 2-year-old fillies. By Daaher, Gypsy Robin won a maiden special weight race over 4 1/2 furlongs by 7 1/2 lengths at Keeneland on April 21 in her only start.\r\n&ldquo;She was extremely impressive in a maiden race at Keeneland,&rdquo; Ward said last week. &ldquo;I think five-eighths, at this point of time [is best], even though she&rsquo;s bred to go farther.&rdquo;\r\nGypsy Robin was an 8-1 chance Monday, the second choice in a field of 14 led by Shumoos, winner of a maiden race in her only start at Haydock Park in England on May 28.\r\nWard won the 2009 Queen Mary with Jealous Again, the first year he sent runners to Royal Ascot.