CREATE TABLE "1990s" (
  "year" real,
  "date" text,
  "event" text,
  "days" text,
  "stages" text,
  "acts" text
);

Question: When was the Metallica: Escape from the Studio show?
SQL: SELECT "date" FROM "1990s" WHERE "event"='metallica: escape from the studio';

Question: When is the Monsters of Rock show with 12 bands?
SQL: SELECT "date" FROM "1990s" WHERE "event"='monsters of rock' AND "acts"='12 bands';