 Complete the following phrase:  Gertrude Liebhart also Gertrude Liebhardt or Trude Liebhardt, born 26 October 1928 was a retired Austrian sprint canoer who won a silver medal in the K-1 500 m event at the 1952 Olympics. She also won two medals in the K-2 500 m event at the ICF Canoe Sprint World Championships with a silver in 1950 and a bronze in 