CREATE TABLE table_3104 ("Year" FLOAT, "Location" TEXT, "Entries" FLOAT, "Winning Boat" TEXT, "Country" TEXT, "Skipper" TEXT)

When 64 is the entries what is the winning boat?
SELECT "Winning Boat" FROM table_3104 WHERE "Entries" = '64'
SELECT "Winning Boat" FROM "table_3104" WHERE "Entries" = '64'