Conversation so far:
Where was David Attenborough born?
Isleworth, Middlesex, England
What did David Attenborough's father do for a living?
David Attenborough's father, Frederick, was principal of the University College, Leicester.
Did David Attenborough have siblings?
Richard Attenborough and John Attenborough

Question: Did his parents foster children?
Self-contained rewrite: Did David Attenborough's parents foster children?