Question: the reaction of iron metal with oxygen to form iron (iii) oxide
[{'answer': 'rusting', 'provenance': [{'wikipedia_id': '26477', 'title': 'Rust', 'start_paragraph_id': 4, 'start_character': 215, 'end_paragraph_id': 4, 'end_character': 222, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26477', 'title': 'Rust', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 420, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3188344212704556950}, 'section': 'Section::::Chemical reactions.:Associated reactions.\n'}]}]