Conversation so far:
What type of music did Bill Monroe originally play?
Bill Monroe originally played blues, gospel and swing music.
WHat type of music was Bill Monroe known for (famous for)?
Bill Monroe is commonly referred to as the Father of Bluegrass.
Did Bill Monroe produce albums?
Kentucky Waltz, Footprints in the Snow, Sweetheart, You Done Me Wrong, and Wicked Path of Sin are some of Bill Monroe's albums.
Did Bill Monroe perform in any concerts?
Monroe kept a hectic touring schedule.

Question: Did he play an instrument or sing in the Grad Ole Opry?
Self-contained rewrite: DId Bill Monroe play an instrument or sing in the Grad Ole Opry?