Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: When the Soviet army liberated the Auschwitz death camp 70 years ago many of the prisoners had been killed or marched away by the retreating Nazis. But among those left were some twin children - the subject of disturbing experiments by Dr Josef Mengele.

The twins of Auschwitz