Question: Ragnall ua Ímair was the grandson of a Viking leader that died in what year?
Sentence (from "Ímar"): Ímar (Old Norse: "Ívarr" ; died c. 873) was a Viking leader in Ireland and Scotland in the mid-late ninth century who founded the Uí Ímair dynasty, and whose descendants would go on to dominate the Irish Sea region for several centuries.
Relevant evidence: Yes