CREATE TABLE table_42134 ("Name" TEXT, "Main span metres" TEXT, "Main span feet" TEXT, "Year to open" FLOAT, "Country" TEXT)

What was the Year to Open for the Dandeung Bridge?
SELECT COUNT("Year to open") FROM table_42134 WHERE "Name" = 'dandeung bridge'
SELECT COUNT("Year to open") FROM "table_42134" WHERE "Name" = 'dandeung bridge'