Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_47 (inception VARCHAR, assets_us$billion VARCHAR, abbreviation VARCHAR)
### Question:
What's the inception for the country with 25.5 billion USD in assets and an abbreviation of psf?
### Answer:
SELECT inception FROM table_name_47 WHERE assets_us$billion = "25.5" AND abbreviation = "psf"