user: Question: What's the inception for the country with 25.5 billion USD in assets and an abbreviation of PSF?
Columns: ['Country', 'Abbreviation', 'Assets US$Billion', 'Inception', 'Origin']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Norway', 'GPF', '785.2', '1990', 'Oil']
SQL:

assistant: SELECT "Inception" FROM "Table" WHERE "Assets US$Billion" = '25.5' AND "Abbreviation" = 'PSF';