Definition: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: In some myths he is the grandson of Gerreindour the Giant, while in others his grandfather is Aegir. Through his intervention Thrall, Karl, and Jarl were born and went on to differentiate the races of men. Because of his shining, golden teeth he is also called Gullintani. He lives in the hall of Himinbjorg and rides the powerful horse Gulltop. At Ragnarok he and Loki will kill each other, so apparently his great hearing and vision can not save him. FTP, name this Norse god who blows Gjallerhorn to announce Ragnarok and who is the guardian of Bifrost, the rainbow bridge.
Output:
Social Science