Who did maximilian kolbe save from being killed?

He was a Polish Catholic priest who founded the Immaculata Movement. He was sent to Auschwitz, a Nazi concentration camp, in 1941. When two prisoners escaped, ten men were selected to die. Father Kolbe had himself substituted for a young father and husband. He survived two weeks without food and water. Four others were also still living. They were then injected with poison and died. They died on the night of the feasting day for the Assumption of the Blessed Mary.