Question: The USS "Phelps" along with the cruiser "Chester", escorted a vessel that served as the flagship for the commander of what?
{'answer': 'Scouting Force 1', 'supporting_facts': [['USS Phelps (DD-360)', 0], ['USS Phelps (DD-360)', 3], ['USS Indianapolis (CA-35)', 0], ['USS Indianapolis (CA-35)', 1]]}