Complex sentence: Knud Rasmussen mentioned about Arnaqaoq, a young Netsilik living in King William Island, that he smeared himself with the blood of a seal or reindeer, telling people that he had a battle with spirits.
Split into simpler sentences: Knud Rasmussen mentioned Arnaqaoq, a young Netsilik living in King William Island. He smeared himself with the blood of a seal or reindeer, telling people that he had a battle with spirits.