CREATE TABLE table_56640 ("Elector" TEXT, "Nationality" TEXT, "Faction" TEXT, "Order and Title" TEXT, "Elevated" TEXT, "Elevator" TEXT)

What is the Elector with a Faction of roman, and an Elevated with 1244, may 28?
SELECT "Elector" FROM table_56640 WHERE "Faction" = 'roman' AND "Elevated" = '1244, may 28'
SELECT "Elector" FROM "table_56640" WHERE "Elevated" = '1244, may 28' AND "Faction" = 'roman'