CREATE TABLE table_31583 ("Name" CLOB, "Location" CLOB, "Launched" FLOAT, "Acquired" CLOB, "Capacity ,  mln tpa" CLOB)

Tell me the average launced for capacity mln tpa of 15,0
SELECT AVG("Launched") FROM table_31583 WHERE "Capacity, mln tpa" = '15,0'
SELECT AVG("Launched") FROM "table_31583" WHERE "Capacity, mln tpa" = '15,0'