You will be given a definition of a task first, then some input of the task.
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.

Orange walks are a series of parades held annually by members of the Orange Order on a regular basis during the summer in Ulster, and mostly in Scotland, and occasionally in :England, and throughout the Commonwealth. These typically build up to 12 July celebrations which mark Prince William of Orange's victory over King James II at the Battle of the Boyne in 1690. Although the term "march" or "parade" is widely used in the media, the Order prefers terms such as "walk" or "demonstration". Orange walks have faced opposition from Catholics, Irish Nationalists, Scottish Nationalists and those on the political left who see the parades as sectarian and triumphalist. Those who attend the procession, however, regard it as having a vital ceremonial significance. Question: Who was the wife of the prince who was the victor of the battle that is celebrated in part by a series of parades known as "Orange walks"? Answer: Mary II
Output:
These typically build up to 12 July celebrations which mark Prince William of Oranges victory over King James II at the Battle of the Boyne in 1690.