Complex sentence: David Haines was abducted in March 2013 by ISIL while working in Syria for the humanitarian aid group ACTED assessing the Atmeh refugee camp near the Turkish border and the Syrian province of Idlib.
Split into simpler sentences: David Haines was abducted in March 2013 by ISIL while working in Syria for the aid group ACTED assessing refugee camp locations in the north of the country. He was kidnapped near the Atmeh refugee camp near the Turkish border and the Syrian province of Idlib.