CREATE TABLE table_18942 ("Asset Acquired" CLOB, "Acquired From" CLOB, "Date Announced" CLOB, "Date Completed" CLOB, "Reported Cost" CLOB)

On what date was it announced that an asset was acquired for US$9 Million?
SELECT "Date Announced" FROM table_18942 WHERE "Reported Cost" = 'US$9 million'
SELECT "Date Announced" FROM "table_18942" WHERE "Reported Cost" = 'US$9 million'