Complex sentence: Due to hyperinflation in Zimbabwe in 2006 to 2008, the government of Zimbabwe has allowed circulation of foreign currency since September 2008 and local currency became obsolete since 12 April 2009.
Split into simpler sentences: Due to hyperinflation in Zimbabwe in 2006 to 2008, the government has allowed circulation of foreign currency since September 2008. Local currency became obsolete since 12 April 2009.