Question: who was the first black superhero in dc
[{'answer': 'Black Lightning', 'provenance': [{'wikipedia_id': '853131', 'title': 'Black Lightning', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '853131', 'title': 'Black Lightning', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 939, 'bleu_score': 0.9451751853826231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4519994851500442117}, 'section': 'Section::::Abstract.'}]}]