Conversation so far:
What didJanis Joplin do in 1943?
Janis Lyn Joplin was born in Port Arthur, Texas, on January 19, 1943.
Who were Janis Joplin's parents?
Janis Joplin's parents were Dorothy Bonita East and Seth Ward Joplin.

Question: Who was her father?
Self-contained rewrite: Who was Janis Joplin's father?