Question: what are the main sources of economic growth in the us currently
[{'answer': 'telecommunications', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 106, 'start_character': 118, 'end_paragraph_id': 106, 'end_character': 136, 'bleu_score': 1.0, 'section': 'Section::::Composition of economic sectors.\n'}]}, {'answer': 'pharmaceuticals', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 103, 'start_character': 434, 'end_paragraph_id': 103, 'end_character': 449, 'bleu_score': 1.0, 'section': 'Section::::Health care.:Cost.\n'}]}, {'answer': 'aircraft', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 107, 'start_character': 283, 'end_paragraph_id': 107, 'end_character': 291, 'bleu_score': 1.0, 'section': 'Section::::Composition of economic sectors.\n'}]}, {'answer': 'heavy machinery', 'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 109, 'start_character': 387, 'end_paragraph_id': 109, 'end_character': 402, 'bleu_score': 1.0, 'section': 'Section::::Composition of economic sectors.\n'}]}, {'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11832431333393357663}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'start_paragraph_id': 109, 'start_character': 0, 'end_paragraph_id': 109, 'end_character': 766, 'bleu_score': 0.9823771291847391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11832431333393357663}, 'section': 'Section::::Composition of economic sectors.\n'}]}, {'provenance': [{'wikipedia_id': '32022', 'title': 'Economy of the United States', 'section': 'Section::::Composition of economic sectors.\n', 'start_paragraph_id': 109, 'end_paragraph_id': 109, 'meta': {'evidence_span': ['addition, growth in telecommunications, pharmaceuticals, aircraft, heavy machinery and other', 'In addition, growth in telecommunications, pharmaceuticals, aircraft, heavy machinery and other industries along with declines in low end, low skill industries such as clothing, toys, and other simple manufacturing have resulted in some U.S. jobs being more highly skilled and better paying.']}}]}]