What is the lowest gain with an 18 long, and a loss less than 191?
CREATE TABLE "rushing" (
  "name" text,
  "gp_gs" text,
  "gain" real,
  "loss" real,
  "long" real,
  "avg_g" real
);
SELECT MIN("gain") FROM "rushing" WHERE "long"=18 AND "loss"<191;