When "virgen de gracia" is the name what is the date of withdrawn?
CREATE TABLE "names_and_fleet_details" (
  "original_number" text,
  "uic_number" text,
  "name" text,
  "constructer" text,
  "constructor_number" real,
  "year" real,
  "withdrawn" text,
  "kilometers_worked" real
);
SELECT "withdrawn" FROM "names_and_fleet_details" WHERE "name"='\"Virgen de Gracia\"';