CREATE TABLE table_78251 ("Year" FLOAT, "Manufacturer" CLOB, "Model" CLOB, "Length  ( ft. ) " CLOB, "Fuel or Propulsion" CLOB, "Fleet series" CLOB, "Quantity" FLOAT)

Name the fleet series with a quantity of 5
SELECT "Fleet series" FROM table_78251 WHERE "Quantity" = '5'
SELECT "Fleet series" FROM "table_78251" WHERE "Quantity" = '5'