Conversation so far:
What did Paul Nemenyi do for a living?
Paul Nemenyi, a Hungarian mathematician and physicist of Jewish heritage, was considered an expert in fluid and applied mechanics.
What country did Paul Nemenyi live in?
Paul Nemenyi lived in the United States

Question: What kind of relationship did Paul and Bobby have?
Self-contained rewrite: What kind of relationship did Paul Nemenyi and Bobby Fischer have?