Question: what is the song bad about by u2
[{'answer': 'heroin addiction', 'provenance': [{'wikipedia_id': '3698466', 'title': 'Bad (U2 song)', 'start_paragraph_id': 1, 'start_character': 116, 'end_paragraph_id': 1, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3698466', 'title': 'Bad (U2 song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 0.9529077664391161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17641370144101329974}, 'section': 'Section::::Abstract.'}]}]