What is Model Number, when Voltage is 2.0V, and when Frequency is 350 mhz?
CREATE TABLE "250_nm" (
  "model_number" text,
  "frequency" text,
  "l2_cache" text,
  "mult" text,
  "voltage" text,
  "socket" text
);
SELECT "model_number" FROM "250_nm" WHERE "voltage"='2.0v' AND "frequency"='350 mhz';