What is the location when the name is "I feel free" b/w "n.s.u.", with a release date of December 1966, on the Atco 6462 label?
CREATE TABLE "single_track_listings" (
  "name" text,
  "location" text,
  "format" text,
  "record_label" text,
  "release_date" text
);
SELECT "location" FROM "single_track_listings" WHERE "name"='\"i feel free\" b/w \"n.s.u.\"' AND "release_date"='december 1966' AND "record_label"='atco 6462';