How many yards for the player with over 0 TDs and an average of 2.9?
CREATE TABLE "running_backs" (
  "player" text,
  "car" real,
  "yards" real,
  "avg" real,
  "td_s" real,
  "long" real
);
SELECT MIN("yards") FROM "running_backs" WHERE "td_s">0 AND "avg"=2.9;