Complex sentence: Hearst management stood behind their contracts and stated that the pressmen broke their contracts by working the night and then walking out in the morning, instead they urged the pressmen to file a formal complaint through an arbitration process.
Split into simpler sentences: Hearst Management stood by their contracts, and contended the pressmen broke their contracts by working the night, and then walking out in the morning. Instead, they urged the pressmen to file a formal complaint through an arbitration process.