| http://www.w3.org/ns/prov#value | - When film was being developed in the 19th and 20th centuries, there was a problem: it was difficult to make photographs that showed both light- and dark-colored faces effectively.When there are two persons in [a] scene, . . . if one has dark make-up and the other light, much care must be exercised in so regulating the light that it neither burns up the light make-up nor is of insufficient streng
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