system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Which episode did Daenerys Targaryen lose her dragon, Viserion, to a White Walker's spear?


assistant
The Night King, the leader of the White Walkers, threw a spear at Viserion, which killed him.