Can you tell me the Mascot that has the School of rosedale?
CREATE TABLE "former_members" (
  "school" text,
  "location" text,
  "mascot" text,
  "county" text,
  "year_joined" real,
  "year_left" text,
  "conference_joined" text
);
SELECT "mascot" FROM "former_members" WHERE "school"='rosedale';