Name the Rank points which have an Event of wc beijing, and Score points of 13, and a Total of 18?
CREATE TABLE "qualification" (
  "shooter" text,
  "event" text,
  "rank_points" text,
  "score_points" text,
  "total" text
);
SELECT "rank_points" FROM "qualification" WHERE "event"='wc beijing' AND "score_points"='13' AND "total"='18';