How many carries for the RB averaging 4.7, and a long of over 30 yards?
CREATE TABLE "running_backs" (
  "player" text,
  "car" real,
  "yards" real,
  "avg" real,
  "td_s" real,
  "long" real
);
SELECT SUM("car") FROM "running_backs" WHERE "avg"=4.7 AND "long">30;