Question: Read this and answer the question

There are many styles of mandolin, but four are common, the Neapolitan or round-backed mandolin, the carved-top mandolin and the flat-backed mandolin. The round-back has a deep bottom, constructed of strips of wood, glued together into a bowl. The carved-top or arch-top mandolin has a much shallower, arched back, and an arched topboth carved out of wood. The flat-backed mandolin uses thin sheets of wood for the body, braced on the inside for strength in a similar manner to a guitar. Each style of instrument has its own sound quality and is associated with particular forms of music. Neapolitan mandolins feature prominently in European classical music and traditional music. Carved-top instruments are common in American folk music and bluegrass music. Flat-backed instruments are commonly used in Irish, British and Brazilian folk music. Some modern Brazilian instruments feature an extra fifth course tuned a fifth lower than the standard fourth course.

Which mandolin is commin in American Folk music and blue grass music?
Answer: Carved-top instruments
Question: Read this and answer the question

From AprilJuly, Soviet and German officials made statements regarding the potential for the beginning of political negotiations, while no actual negotiations took place during that time period. The ensuing discussion of a potential political deal between Germany and the Soviet Union had to be channeled into the framework of economic negotiations between the two countries, because close military and diplomatic connections, as was the case before the mid-1930s, had afterward been largely severed. In May, Stalin replaced his Foreign Minister Maxim Litvinov, who was regarded as pro-western and who was also Jewish, with Vyacheslav Molotov, allowing the Soviet Union more latitude in discussions with more parties, not only with Britain and France.

Which two countries positioned themselves to broker a deal returning to a pre-1930's treaty with each other?
Answer: Soviet and German
Question: Read this and answer the question

Sony renamed the record company Sony Music Entertainment (SME) on January 1, 1991, fulfilling the terms set under the 1988 buyout, which granted only a transitional license to the CBS trademark. The CBS Associated label was renamed Epic Associated. Also on January 1, 1991, to replace the CBS label, Sony reintroduced the Columbia label worldwide, which it previously held in the United States and Canada only, after it acquired the international rights to the trademark from EMI in 1990. Japan is the only country where Sony does not have rights to the Columbia name as it is controlled by Nippon Columbia, an unrelated company. Thus, until this day, Sony Music Entertainment Japan does not use the Columbia trademark for Columbia label recordings from outside Japan which are issued in Japan. The Columbia Records trademark's rightsholder in Spain was Bertelsmann Music Group, Germany, which Sony Music subsequently subsumed via a 2004 merger, followed by a 2008 buyout.

Who owns the rights to the Columbia label in Japan?
Answer:
Nippon Columbia