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.
Who was Janis Joplin's father?
Janis Joplin's father was Seth Ward Joplin, an engineer at Texaco

Question: Did she have any siblings?
Self-contained rewrite: Did Janis Joplin have any siblings?