With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Synchronized sound is part of the film Snow White and the Seven Dwarfs (1937 film).
text_B: A sound film is a motion picture with synchronized sound , or sound technologically coupled to image , as opposed to a silent film .. synchronized. synchronization. silent film. silent film. The first known public exhibition of projected sound films took place in Paris in 1900 , but decades passed before sound motion pictures were made commercially practical .. Reliable synchronization was difficult to achieve with the early sound-on-disc systems , and amplification and recording quality were also inadequate .. sound-on-disc. sound-on-disc. Innovations in sound-on-film led to the first commercial screening of short motion pictures using the technology , which took place in 1923 .. sound-on-film. sound-on-film. short motion pictures. Short film. The primary steps in the commercialization of sound cinema were taken in the mid - to late 1920s .. At first , the sound films which included synchronized dialogue , known as `` talking pictures '' , or `` talkies '' , were exclusively shorts .. synchronized. synchronization. The earliest feature-length movies with recorded sound included only music and effects .. feature-length. feature film. The first feature film originally presented as a talkie was The Jazz Singer , released in October 1927 .. The Jazz Singer. The Jazz Singer. A major hit , it was made with Vitaphone , which was at the time the leading brand of sound-on-disc technology .. sound-on-disc. sound-on-disc. Vitaphone. Vitaphone. Sound-on-film , however , would soon become the standard for talking pictures .. By the early 1930s , the talkies were a global phenomenon .. In the United States , they helped secure Hollywood 's position as one of the world 's most powerful cultural / commercial centers of influence -LRB- see Cinema of the United States -RRB- .. Cinema of the United States. Cinema of the United States. In Europe -LRB- and , to a lesser degree , elsewhere -RRB- , the new development was treated with suspicion by many filmmakers and critics , who worried that a focus on dialogue would subvert the unique aesthetic virtues of soundless cinema .. In Japan , where the popular film tradition integrated silent movie and live vocal performance , talking pictures were slow to take root .. Japan. Cinema of Japan. In India , sound was the transformative element that led to the rapid expansion of the nation 's film industry .
related.