Complex sentence: It made its radio debut on July 9,2007 on Australian radio stations, and subsequently the single was released on August 4,2007 in Australia, and on August 13 2007 in the United States.
Split into simpler sentences: It made its radio debut on July 9,2007 on Australian radio stations. The single was released on August 4,2007 in Australia, and on August 13 2007 in the United States.