Problem: When Cowan Powers and his family recorded their old-time music from 1924-1926, his daughter Orpha Powers was one of the earliest known southern-music artists to record with the mandolin. By the 1930s, single mandolins were becoming more commonly used in southern string band music, most notably by brother duets such as the sedate Blue Sky Boys (Bill Bolick and Earl Bolick) and the more hard-driving Monroe Brothers (Bill Monroe and Charlie Monroe). However, the mandolin's modern popularity in country music can be directly traced to one man: Bill Monroe, the father of bluegrass music. After the Monroe Brothers broke up in 1939, Bill Monroe formed his own group, after a brief time called the Blue Grass Boys, and completed the transition of mandolin styles from a "parlor" sound typical of brother duets to the modern "bluegrass" style. He joined the Grand Ole Opry in 1939 and its powerful clear-channel broadcast signal on WSM-AM spread his style throughout the South, directly inspiring many musicians to take up the mandolin. Monroe famously played Gibson F-5 mandolin, signed and dated July 9, 1923, by Lloyd Loar, chief acoustic engineer at Gibson. The F-5 has since become the most imitated tonally and aesthetically by modern builders.
What family recorded an old-time music in 1924-1926?
---
Answer: Cowan Powers and his family

Problem: In 1926, Universal opened a production unit in Germany, Deutsche Universal-Film AG, under the direction of Joe Pasternak. This unit produced three to four films per year until 1936, migrating to Hungary and then Austria in the face of Hitler's increasing domination of central Europe. With the advent of sound, these productions were made in the German language or, occasionally, Hungarian or Polish. In the U.S., Universal Pictures did not distribute any of this subsidiary's films, but at least some of them were exhibited through other, independent, foreign-language film distributors based in New York, without benefit of English subtitles. Nazi persecution and a change in ownership for the parent Universal Pictures organization resulted in the dissolution of this subsidiary.
What opened in 1962?
---
Answer: unanswerable

Problem: Phonetically in some languages, such as Navajo, aspiration of stops tends to be realised as voiceless velar airflow; aspiration of affricates is realised as an extended length of the frication.
In Navajo, the aspiration of affricates can be seen as what?
---
Answer:
an extended length of the frication