What is the album for the number 6 with the 1st week position of #1?
CREATE TABLE "highest_first_week_sales" (
  "number" real,
  "artist" text,
  "album" text,
  "1st_week_sales" real,
  "1st_week_position" text
);
SELECT "album" FROM "highest_first_week_sales" WHERE "1st_week_position"='#1' AND "number"=6;