 Complete the following phrase:  the Brazilian team composed by Fratus, César Cielo, Marcelo Chierighini and Gabriel Santos achieved a historic result by winning the silver medal, the best Brazilian result of all time at World Championships in this race. Brazil beat the South American record of 2009, still in the super-suits era, with a time of 3:10.34, just 0.28 from the US team. The last medal of Brazil in this race, in Worlds, had been obtained in 1994. In the Mens 50 metre freestyle, Fratus made the best time of his life in the race, 21.27, thus winning the silver medal. Fratus beat the best time of César Cielo in this race without the super-suits 21.32. He also helped Brazils 