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.
Q: Robert James Douglas (born 24 April 1972 in Lanark) is a Scottish former footballer, who played as a goalkeeper. Douglas played for several clubs, including Livingston, Dundee, Celtic, Leicester City and Forfar Athletic. Douglas was part of the Celtic side that reached the 2003 UEFA Cup Final, under the management of Martin O'Neill. He also represented Scotland at international level, playing 19 times between 2002 and 2005. Question: Robert Douglas was part of the team that reached the 2003 UEFA Cup final under the manager from what country? Answer: Northern Ireland
A:
Douglas was part of the Celtic side that reached the 2003 UEFA Cup Final, under the management of Martin ONeill.