What is the brand name associated with the model named e4xxx?
CREATE TABLE "variants" (
  "processor" text,
  "brand_name" text,
  "model_list" text,
  "cores" real,
  "l2_cache" text,
  "socket" text,
  "tdp" text
);
SELECT "brand_name" FROM "variants" WHERE "model_list"='E4xxx';