Complex sentence: In over 80 interviews of workers conducted by Reuter's journalists, a frequent complaints were the lack of proper training, and links between the contractors, subcontractors and Yazuka organized crime group.
Split into simpler sentences: In over 80 interviews of workers conducted by Reuter's journalists, a frequent complaint was the lack of proper training. They also cited alliances between the contractors, subcontractors and Yazuka organized crime group.