Conversation so far:
What year did Hedy Lamarr marry the first time?
On August 10, 1933, at the age of 18, Hedy Lamar married Friedrich Mandl, then 33.
Who did Hedy Lamarr marry?
Hedy Lamar married Friedrich Mandl.

Question: Where did they meet?
Self-contained rewrite: Where did Hedy Larmarr meet Freidrich Mandl?