Input (grade 12): Together with his friend Christian Gaudian, Gueffroy attempted on the night of February 5 - 6, 1989, to escape from East Berlin to West Berlin, along the Britz district canal.
Output (grade 6): Gueffroy and his friend Christian Gaudian tried to escape from East Berlin to West Berlin on the night of 5 to 6 February 1989. They tried to cross near the Britz district canal.