Complex sentence: Two suicide bombers carried out an attack in Kabul on March 12,2006 against Sibghatullah Mojaddedi, while he was a member of the upper house and head of a reconciliation committee aimed at engaging former Taliban members.
Split into simpler sentences: Two suicide bombers carried out an attack in Kabul on March 12,2006 against Sibghatullah Mojaddedi. At the time of the attack, he was a member of the upper house of parliament and head of a reconciliation committee aimed at engaging former Taliban members.