The conversation between human and AI assistant.
[|Human|] In the series A Song of Ice and Fire, who is the founder of House Longwaters?
[|AI|] The founder of Longwaters is only known as a knight and son of Ser Jon Waters. He is only known as Longwaters.
[|Human|] 
In the series A Song of Ice and Fire, who is the founder of House Longwaters?