What is the lowest enrolled school that was founded in 1992 and joined a conference before 1998?
CREATE TABLE "members" (
  "institution" text,
  "location" text,
  "founded" text,
  "joined_conference" real,
  "enrollment" real,
  "nickname" text
);
SELECT MIN("enrollment") FROM "members" WHERE "founded"='1992' AND "joined_conference"<1998;