CREATE TABLE table_1373542_1 (date_completed VARCHAR2, date_announced VARCHAR2)

On what date was the asset acquisition that was announced on February 22, 2007 completed?
SELECT date_completed FROM table_1373542_1 WHERE date_announced = "February 22, 2007"
SELECT "date_completed" FROM "table_1373542_1" WHERE "February 22, 2007" = "date_announced"