When was the Lisa 2 model discontinued?
CREATE TABLE "list_of_macintosh_models_grouped_by_cpu_" (
  "processor" text,
  "model" text,
  "clock_speed_m_hz" real,
  "l1_cache_bytes" text,
  "introduced" text,
  "discontinued" text
);
SELECT "discontinued" FROM "list_of_macintosh_models_grouped_by_cpu_" WHERE "model"='lisa 2';