Input (grade 13): As a result of the building of two more developing areas (Hellersdorf and Kaulsdorf) the number of inhabitants increased so that the borough Hellersdorf was founded out of the three districts Hellersdorf, Kaulsdorf and Mahlsdorf on 1 June 1986.
Output (grade 10): The borough contains of five former villages: Biesdorf, Hellersdorf, Kaulsdorf, Mahlsdorf and Marzahn, which became part of Berlin in 1920.