what is 2011 when the rank is less than 8 and the water park is ocean world?
CREATE TABLE "water_parks_in_terms_of_attendance" (
  "rank" real,
  "water_park" text,
  "location" text,
  "2011" real,
  "2012" real
);
SELECT SUM("2011") FROM "water_parks_in_terms_of_attendance" WHERE "rank"<8 AND "water_park"='ocean world';