What is the average BW 2013 ranking of Texas, Fort Worth, which has an AE 2011 ranking of 1000 and an FT 2011 ranking less than 1000?
CREATE TABLE "current_individual_rankings" (
  "location_state_city" text,
  "usn_2013" real,
  "bw_2013" real,
  "forbes_2011" real,
  "ec_2013" real,
  "ft_2011" real,
  "ae_2011" real,
  "cnn_2011" real,
  "bi_2013" real,
  "arwu_2012" real
);
SELECT AVG("bw_2013") FROM "current_individual_rankings" WHERE "ae_2011"=1000 AND "location_state_city"='texas, fort worth' AND "ft_2011"<1000;