Question: how did the hadean eon get its name
[{'answer': 'Hades', 'provenance': [{'wikipedia_id': '55397', 'title': 'Hadean', 'start_paragraph_id': 3, 'start_character': 15, 'end_paragraph_id': 3, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Etymology.\n'}]}, {'provenance': [{'wikipedia_id': '55397', 'title': 'Hadean', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 327, 'bleu_score': 0.888364333318414, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12600749096459298287}, 'section': 'Section::::Etymology.\n'}]}]