What is the price of the internet provider that has an upstream rate of 256 kbit and a downstream rate of 512 kbit?
CREATE TABLE "saudi_arabia" (
  "internet_plan" text,
  "downstream" text,
  "upstream" text,
  "bandwidth_included" text,
  "price" text
);
SELECT "price" FROM "saudi_arabia" WHERE "upstream"='256 kbit' AND "downstream"='512 kbit';