Question: who aided heracles in his second labor by cauterizing
[{'answer': 'Iolaus', 'provenance': [{'wikipedia_id': '1418970', 'title': 'Labours of Hercules', 'start_paragraph_id': 4, 'start_character': 209, 'end_paragraph_id': 4, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::Backstory.\n'}]}, {'provenance': [{'wikipedia_id': '1418970', 'title': 'Labours of Hercules', 'start_paragraph_id': 30, 'start_character': 0, 'end_paragraph_id': 30, 'end_character': 1143, 'bleu_score': 0.93312692331632, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16229242443753767068}, 'section': 'Section::::Labours.:Second: Lernaean Hydra.\n'}]}]