Given the task definition and input, reply with output. In this task, the input is a set of dialogues between a user and an assistant. You need to find the dialogue that is basically a response given to a question or an aspect of the user.

Yes, that's true. One of the most important sources for the history of the 11th century Vikings is the treaty between the Icelanders and Olaf Haraldsson, who was the king of Norway circa 1015 to 1028.
Thanks so much
Cool! What is the population there?
I see. They're known for quite a bit! What can you tell me about its history?
I see and what are those natural resources?
Yes, that's true. One of the most important sources for the history of the 11th century Vikings is the treaty between the Icelanders and Olaf Haraldsson, who was the king of Norway circa 1015 to 1028.