user: Who directed the episode of Game of Thrones where Jon Snow and Tormund Giantsbane go to ask the wildlings to settle beyond the Wall, but end up encountering White Walkers and the Night King?

assistant: Season five, episode eight entitled "Hardhome"

user: Name a battlefield surgeon

assistant: Vera Gedroits was a ground-breaking physician and surgeon who improved surgical practices on the battlefield and became the first woman to serve as a physician to the Imperial Court of Russia.

user: Who built Sigiriya fortress in Sri Lanka?

assistant: King Kashyapa developed Sigiriya city and fortress.