Question: what might change the resources that an economy has available over time
[{'answer': 'technology', 'provenance': [{'wikipedia_id': '19080286', 'title': 'Natural resource economics', 'start_paragraph_id': 7, 'start_character': 786, 'end_paragraph_id': 7, 'end_character': 796, 'bleu_score': 1.0, 'section': 'Section::::Areas of discussion.\n'}]}, {'provenance': [{'wikipedia_id': '19080286', 'title': 'Natural resource economics', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 286, 'bleu_score': 0.96188712955549, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17410937416770552283}, 'section': 'Section::::Perpetual resources vs. exhaustibility.:Background and introduction.\n'}]}]