Question: who wrote the lyrics to nutshell by alice in chains
[{'answer': 'Layne Staley', 'provenance': [{'wikipedia_id': '13956924', 'title': 'Nutshell (song)', 'start_paragraph_id': 5, 'start_character': 411, 'end_paragraph_id': 5, 'end_character': 423, 'bleu_score': 1.0, 'section': 'Section::::Live performances.\n'}]}]