Question: who is singing for alice in chains now
[{'answer': 'William Bradley DuVall', 'provenance': [{'wikipedia_id': '5293052', 'title': 'William DuVall', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5293052', 'title': 'William DuVall', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 488, 'bleu_score': 0.809255937368027, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13811128823514120257}, 'section': 'Section::::Abstract.'}]}]