CREATE TABLE table_19007 ("Rank" FLOAT, "Airport" TEXT, "Total Passengers" FLOAT, "% Change 2007/2008" TEXT, "International Passengers" FLOAT, "Domestic Passengers" FLOAT, "Transit Passengers" FLOAT, "Aircraft Movements" FLOAT, "Freight  (  Metric Tonnes  ) " FLOAT)

What is the total number of passengers of the airport ranked 15?
SELECT "International Passengers" FROM table_19007 WHERE "Rank" = '15'
SELECT "International Passengers" FROM "table_19007" WHERE "Rank" = '15'