Which Location has a Previous Conference of independents, and a Mascot of hilltoppers?
CREATE TABLE "membership" (
  "school" text,
  "location" text,
  "mascot" text,
  "size" real,
  "ihsaa_class" text,
  "county" text,
  "year_joined" real,
  "previous_conference" text
);
SELECT "location" FROM "membership" WHERE "previous_conference"='independents' AND "mascot"='hilltoppers';