What Elector has the Place of birth of San Severino?
CREATE TABLE "absentee_cardinals" (
  "elector" text,
  "place_of_birth" text,
  "cardinalatial_title" text,
  "elevated" text,
  "elevator" text
);
SELECT "elector" FROM "absentee_cardinals" WHERE "place_of_birth"='san severino';