What is the Nationality with an Elector with bertrand de saint-martin?
CREATE TABLE "cardinal_electors" (
  "elector" text,
  "nationality" text,
  "faction" text,
  "order_and_title" text,
  "elevated" text,
  "elevator" text
);
SELECT "nationality" FROM "cardinal_electors" WHERE "elector"='bertrand de saint-martin';