Conversation so far:
What was the folk revival in regards to Bill Monroe?
In regards to Bill Monroe, the folk revival is a roots revival which includes young performers popularizing the traditional musical styles of their ancestors.
What is the most interesting thing about Bill Monroe?
Were there other popular artists besides Bill Monroe at the time of the folk revival?
The Weavers were a popular group at the beginning of the folk revival.

Question: What time period was all this happening?
Self-contained rewrite: What time period were Bill Monroe and the folk revival happening?