CREATE TABLE table_67205 ("Year" FLOAT, "Denomination" CLOB, "Reverse" CLOB, "Weight" CLOB, "Diameter" CLOB, "Fineness" CLOB, "Series" CLOB)

What's the diameter of the 2006 equestrian Reverse?
SELECT "Diameter" FROM table_67205 WHERE "Year" = '2006' AND "Reverse" = 'equestrian'
SELECT "Diameter" FROM "table_67205" WHERE "Reverse" = 'equestrian' AND "Year" = '2006'