With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Clementine Chapel has a monument that was placed by Emperor Constantine.
text_B: The Clementine Chapel , also known as La Clementina , is a particular Roman Catholic chapel located within the underground necropolitan grottoes of Saint Peter 's Basilica in Vatican City .. Roman Catholic. Roman Catholic. Vatican City. Vatican City. It is the area where the relics of St. Peter were venerated in early medieval times , before his skull was removed to be housed at the Archbasilica of St. John Lateran .. Archbasilica of St. John Lateran. Archbasilica of St. John Lateran. Open today for pilgrims , the site venerates the original pavonazzo marble monument placed there by Emperor Constantine , and was used in early medieval times to house the skull of St. Peter. pavonazzo marble. pavonazzo marble. Emperor Constantine. Constantine the Great
related.