Which Opposing Team has an Against smaller than 19, and a Date of 20/05/1979?
CREATE TABLE "matches" (
  "opposing_team" text,
  "against" real,
  "date" text,
  "venue" text,
  "status" text
);
SELECT "opposing_team" FROM "matches" WHERE "against"<19 AND "date"='20/05/1979';