Question: human interaction with the nitrogen cycle is primarily due to
[{'answer': 'the agricultural sector', 'provenance': [{'wikipedia_id': '11632817', 'title': 'Human impact on the nitrogen cycle', 'start_paragraph_id': 1, 'start_character': 519, 'end_paragraph_id': 1, 'end_character': 542, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11632817', 'title': 'Human impact on the nitrogen cycle', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 720, 'bleu_score': 0.9005106828907101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1828180764506607560}, 'section': 'Section::::Abstract.'}]}]