CREATE TABLE table_name_13 (year_opened INT, span_feet VARCHAR, span_metres VARCHAR)

What is the sum of Year opened when the span feet is more than 1247, and the spam metres is 384?
SELECT SUM(year_opened) FROM table_name_13 WHERE span_feet > 1247 AND span_metres = 384
SELECT SUM("year_opened") FROM "table_name_13" WHERE "span_feet" > 1247 AND "span_metres" = 384