Question: what are the major sectors that make up the u.s. economy
[{'answer': 'Agriculture', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 48, 'start_character': 305, 'end_paragraph_id': 48, 'end_character': 316, 'bleu_score': 1.0, 'section': 'Section::::Employment.:Unemployment.\n'}]}, {'answer': 'Industry', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 138, 'start_character': 344, 'end_paragraph_id': 138, 'end_character': 352, 'bleu_score': 1.0, 'section': 'Section::::Financial position.\n'}]}, {'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.'}]}]