Task: Explanation
Input (English): Leica Camera AG is a German company that manufactures optics and high end cameras. The company was founded by Ernst Leitz in 1924. The name Leica is derived from the first three letters of his surname (Leitz) and the first two of the word camera: lei-ca. Question: What Japanese brand-name lens was used between 1940 and 1980 by the German camera company founded by Ernst Leitz? Answer: Rokkor was a brand name used for all Chiyoda Kōgaku Seikō and later Minolta lenses between 1940 and 1980
Output (English):  The company was founded by Ernst Leitz in 1924.