 Complete the following phrase:  Kristel Vourna born 11 February 1992 is a Greek swimmer. At the 2012 Summer Olympics in London, she competed in the Womens 100 metre butterfly. She took the 12th place overall, finishing 7th in the second semifinal in the 100 metre butterfly with a Greek record of 58.31 seconds. She also swam the anchor leg of Greeces 