The term 'living history' describes the performance of bringing history to life for the general public in a manner that in most cases is not following a planned script. Historical presentation includes a continuum from well researched attempts to recreate a known historical event for educational purposes, through representations with theatrical elements, to competitive events for purposes of entertainment. The line between amateur and professional presentations at living history museums can be blurred. While the latter routinely use museum professionals and trained interpreters to help convey the story of history to the public, some museums and historic sites employ living history groups with high standards of authenticity for the same role at special events.