Question: which sector dominates developed economies such as the united states
[{'answer': 'Services', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 2, 'start_character': 951, 'end_paragraph_id': 2, 'end_character': 959, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]