Complex sentence: The papal coronation of Our Lady of Luján took place on 8 May 1887 by Archbishop Federico León Aneiros, who at that time made a pilgrimage in thanksgiving to Our Lady for sparing his archdiocese from the scourge of cholera.
Split into simpler sentences: The papal coronation of Our Lady of Luján took place on May 8,1887. The celebrant chosen by the Pope for this event was Archbishop Aueiros, who at that time made a pilgrimage in thanksgiving to Our Lady for sparing his archdiocese from the scourge of cholera.