Complex sentence: The group originated as Jama'at al-Tawhid wal-Jihad in 1999 and this group was the forerunner of Tanzim Qaidat al-Jihad fi Bilad al-Rafidayn, commonly known as Al-Qaeda in Iraq (AQI).
Split into simpler sentences: The group originated as Jama'at al-Tawhid wal-Jihad in 1999. This group was the forerunner of "Tanzim Qaidat al-Jihad fi Bilad al-Rafidayn", commonly known as Al-Qaeda in Iraq (AQI).