Q: In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
John Stewart, Earl of Mar and Garioch (c. 1456c. 1479) was the youngest surviving son of James II of Scotland and Mary of Guelders. Question: Who was the wife of the king of the Scots who was assassinated on 21 February 1437? Answer: Mary of Guelders
A:
John Stewart, Earl of Mar and Garioch c. 1456c. 1479 was the youngest surviving son of James II of Scotland and Mary of Guelders.