Complex sentence: Vrba was deported on 15 June 1942 to the Majdanek concentration camp, a Nazi-German camp in Poland, and on 30 June was sent to Auschwitz I, the administrative centre of the Auschwitz camps, where he was housed in Block 4.
Split into simpler sentences: Vrba was deported on 15 June 1942 to the Majdanek concentration camp, a Nazi-German camp in Poland. On 30 June he was sent to Auschwitz I, the administrative centre of the Auschwitz camps, where he was housed in Block 4.