Complex sentence: The 2005 Malawi food crisis is a severe food security crisis affecting more than five million people in Malawi, especially in the south, caused by the failure to harvest sufficient staple maize due to a drought.
Split into simpler sentences: The 2005 Malawi food crisis is a severe food security crisis affecting more than five million people, especially in Southern Malawi. The crisis is caused by the failure to harvest sufficient staple maize due to a drought.