James Martin Pacelli McGuinness, was an Irish republican and Sinn Féin politician who from May 2007 to January 2017, who had a titled partial position, are the joint heads of the Northern Ireland Executive and have overall responsibility for the running of the Executive Office?
First Minister and deputy First Minister: The First Minister and deputy First Minister are the joint heads of the Northern Ireland Executive and have overall responsibility for the running of the Executive Office.
i don't know