Question: which gas has the highest concentration in our environment
[{'answer': 'nitrogen ,', 'provenance': [{'wikipedia_id': '202898', 'title': 'Atmosphere of Earth', 'start_paragraph_id': 18, 'start_character': 117, 'end_paragraph_id': 18, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Stratification.:Exosphere.\n'}]}, {'provenance': [{'wikipedia_id': '202898', 'title': 'Atmosphere of Earth', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 355, 'bleu_score': 0.7160582126571761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16744744997562081977}, 'section': 'Section::::Abstract.'}]}]