Original sentence: The Montejurra Incidents, a part of Neofascist terrorism in Spain, took place on May 9, 1976, when two men were killed by right-wing gunmen supported by the national security services, at the annual Carlist Party celebration that was held in Montejurra, Navarre, Spain
Edited sentence: The Montejurra Massacre or  Montejurra Incidents, a notorious event of Neofascist terrorism in Spain, took place on May 9, 1976, when two men were killed by right-wing gunmen supported by the national security services, at the annual Carlist Party celebration that was held in Montejurra, Navarre, Spain