CREATE TABLE table_51140 ("2004/ 05" CLOB, "2007/ 08" CLOB, "2010/ 11" CLOB, "2011/ 12" CLOB, "2012/ 13" CLOB)

What is the 2011/ 12 when the 2010/ 11 is not held, and the 2012/ 13 is A?
SELECT "2011/ 12" FROM table_51140 WHERE "2010/ 11" = 'not held' AND "2012/ 13" = 'a'
SELECT "2011/ 12" FROM "table_51140" WHERE "2010/ 11" = 'not held' AND "2012/ 13" = 'a'