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', 'supporting_facts': [['Rokkor', 0], ['Leica Camera', 0], ['Leica Camera', 1]]}