Input (grade 11): Steglitz-Zehlendorf is the sixth borough of Berlin, formed in Berlin's 2001 administrative reform by merging the former boroughs of Steglitz and Zehlendorf.
Output (grade 4): Steglitz-Zehlendorf is a borough of Berlin. It was formed in 2001 when the former boroughs of Steglitz and Zehlendorf were joined together.