Complex sentence: Filming started in August, 2005 and finished in April, 2006 with a budget of $175 million wich was considered "one of the most expensive films" at the time of its release.
Split into simpler sentences: Filming started in August, 2005 and finished in April, 2006. The film had a budget of $175 million and was considered "one of the most expensive films" at the time of its release.