Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_1373542_1 ( date_announced VARCHAR, reported_cost VARCHAR )

### Question ###
On what date was it announced that an asset was acquired for US$9 Million?

### Accurate SQL ###

SELECT date_announced FROM table_1373542_1 WHERE reported_cost = "US$9 million"