Question: Óttarr svarti ("Óttarr the Black") was an 11th-century Icelandic skald, he was the last court poet, finally of which King of Denmark, England and Norway; together often referred to as the North Sea Empire?
Sentence (from "Þórarinn Skeggjason"): According to "Skáldatal", he was a court poet of the Norwegian king Harald Hardrada.
Relevant evidence: No