Question: who was the first superhero in dc comics
[{'answer': 'Superman', 'provenance': [{'wikipedia_id': '2311067', 'title': 'List of superhero debuts', 'start_paragraph_id': 2, 'start_character': 195, 'end_paragraph_id': 2, 'end_character': 203, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]