Question: what are the three main factors of production
[{'answer': 'land', 'provenance': [{'wikipedia_id': '11231', 'title': 'Factors of production', 'start_paragraph_id': 1, 'start_character': 355, 'end_paragraph_id': 1, 'end_character': 359, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'labour', 'provenance': [{'wikipedia_id': '11231', 'title': 'Factors of production', 'start_paragraph_id': 3, 'start_character': 114, 'end_paragraph_id': 3, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'capital', 'provenance': [{'wikipedia_id': '11231', 'title': 'Factors of production', 'start_paragraph_id': 1, 'start_character': 372, 'end_paragraph_id': 1, 'end_character': 379, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11231', 'title': 'Factors of production', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 565, 'bleu_score': 0.7319615642866181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17143509176632901884}, 'section': 'Section::::Abstract.'}]}]