Question: what type of chemical reaction occurs in anode
[{'answer': 'oxidation', 'provenance': [{'wikipedia_id': '2392', 'title': 'Anode', 'start_paragraph_id': 1, 'start_character': 543, 'end_paragraph_id': 1, 'end_character': 552, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2392', 'title': 'Anode', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 669, 'bleu_score': 0.9806740509884301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13534409521206991683}, 'section': 'Section::::Electrolytic anode.\n'}]}]