What is the Height (ft) of the Churchill House with a Height (m) less than 59?
CREATE TABLE "tallest_completed_buildings_and_structur" (
  "rank" text,
  "name" text,
  "height_m" real,
  "height_ft" real,
  "floors" text
);
SELECT COUNT("height_ft") FROM "tallest_completed_buildings_and_structur" WHERE "name"='churchill house' AND "height_m"<59;