Complex sentence: Five-hundred more Chadian troops came in support via the base in Kidal during "clean-up operations" in the area but no sign as to the seven French hostages was found, a key objective to the mission likewise.
Split into simpler sentences: Five-hundred more Chadian troops came in to provide support, via the base in Kidal during "clean-up operations" in the area. No sign as to the seven French hostages was found, a key objective to the mission likewise.