Which IHSAA Class is located in charlottesville?
CREATE TABLE "resources" (
  "school" text,
  "location" text,
  "mascot" text,
  "enrollment" real,
  "ihsaa_class" text,
  "county" text,
  "primary_conference" text
);
SELECT "ihsaa_class" FROM "resources" WHERE "location"='charlottesville';