How many enrollments have a location of Guelph and a 1-year ranking of 727 larger than 717?
CREATE TABLE "ugdsb_secondary_schools" (
  "name" text,
  "location" text,
  "enrollment" real,
  "1_year_ranking_of_727" real,
  "5_year_ranking_of_693" real
);
SELECT COUNT("enrollment") FROM "ugdsb_secondary_schools" WHERE "location"='guelph' AND "1_year_ranking_of_727">717;