I want to know the answer to the following question:
The setting the mandolin was used in until the 1930's was?
All the background I'm provided with is that "However, The "Loar" became the defining instrument of bluegrass music when Bill Monroe purchased F-5 S/N 73987 in a Florida barbershop in 1943 and popularized it as his main instrument.". Is that enough to answer the question?
Answer: no