Who directed the premiere episode of season four of Game of Thrones?
D.B. Weiss, who also co-authored the season four premiere episode, directed "Two Swords."
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Who directed the premiere episode of season four of Game of Thrones?
### Input: 
### Response: D.B. Weiss, who also co-authored the season four premiere episode, directed "Two Swords."