CREATE TABLE table_57608 ("Country" CLOB, "Abbreviation" CLOB, "Assets US$Billion" CLOB, "Inception" CLOB, "Origin" CLOB)

What's the inception for the country with 25.5 billion USD in assets and an abbreviation of psf?
SELECT "Inception" FROM table_57608 WHERE "Assets US$Billion" = '25.5' AND "Abbreviation" = 'psf'
SELECT "Inception" FROM "table_57608" WHERE "Abbreviation" = 'psf' AND "Assets US$Billion" = '25.5'