Question: who is the current lead singer for skid row
[{'answer': 'Sebastian Bach', 'provenance': [{'wikipedia_id': '13529515', 'title': 'List of Skid Row members', 'start_paragraph_id': 1, 'start_character': 288, 'end_paragraph_id': 1, 'end_character': 302, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]