What is the average for the team with n/a in 1992 and 37 in 1992-93?
CREATE TABLE "relegation" (
  "team" text,
  "average" text,
  "points" real,
  "played" real,
  "1991_92" text,
  "1992_93" text,
  "1993_94" real
);
SELECT "average" FROM "relegation" WHERE "1991_92"='N/A' AND "1992_93"='37';