CREATE TABLE table_name_23 (main_span_metres VARCHAR2, main_span_feet VARCHAR2, year_to_open VARCHAR2, country VARCHAR2)

What is the Main span of the bridge from China with a Year to open of 2013 and Main span feet of 2,585?
SELECT main_span_metres FROM table_name_23 WHERE year_to_open = 2013 AND country = "china" AND main_span_feet = "2,585"
SELECT "main_span_metres" FROM "table_name_23" WHERE "2,585" = "main_span_feet" AND "china" = "country" AND "year_to_open" = 2013