instruction: Who was the winner of Top Chef Season 4?
context: Stephanie Izard is an American chef and television personality best known as the first female chef to win Bravo's Top Chef, taking the title during its fourth season. She is the co-owner and executive chef of three award-winning Chicago restaurants, Girl and the Goat, Little Goat, and Duck Duck Goat, and opened her first restaurant, Scylla (now closed) as chef-owner at the age of 27. Izard received a James Beard Foundation Award for "Best Chef: Great Lakes" in 2013 for her work at Girl and the Goat. She has made a number of appearances on Top Chef since her win, both as a guest judge on subsequent seasons and as a participant in Top Chef Duels. In 2017, Izard competed in the Food Network series Iron Chef Gauntlet, where she overall defeated chefs Bobby Flay, Michael Symon, and Masaharu Morimoto to obtain the title of Iron Chef.
response: Stephanie Izard won the fourth season of Top Chef