What was the world rank by THE-WUR in 2013 of the university whose world rank by QS in 2013 was 113th? 
CREATE TABLE "universities" (
  "members" text,
  "country" text,
  "year_established" real,
  "world_rank_by_the_wur_2013" text,
  "world_rank_by_arwu_2013" text,
  "world_rank_by_qs_2013" text
);
SELECT "world_rank_by_the_wur_2013" FROM "universities" WHERE "world_rank_by_qs_2013"='113th';