You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when do white walkers appear in game of thrones?" whose answer is Oathkeeper.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when do white walkers appear in game of thrones
Useful Output:

Doc 1: Cersei Lannister can throw a world-class icy stare, but on Game of Thrones, nobody does bone-chilling evil like the Night King and his White
Doc 2: In season three, Sam stabbed a White Walker in the shoulder with the dragonglass and the creature instantly shattered. More recently, through a
Doc 3: White Walker ; Novel: A Game of Thrones (1996); Television: "Winter Is Coming" (2011) · Television: House of the Dragon; "The Queen Who Ever Was" (2024) · George
Doc 4: While Drogon's dragonfire later vaporized quite a few wights, that appeared to have as much to do with the force and extreme heat of the blast
Doc 5: But at the very least, they want to come south of the Wall and create more soldiers for army of the dead. But they can only do that in winter. (