Input (grade 12): DÃ rflein also accompanied Knut on his twice-daily one-hour shows for the public and therefore appeared in many videos and photographs alongside the cub.
Output (grade 6): DÃ rflein also appeared with Knut on the twice-daily one-hour shows at the zoo. Because of this, he appeared in lots of videos and photographs with the cub, and became well-known in Germany.