Question: what is the name of ichigo's sword in bleach
[{'answer': 'Zangetsu', 'provenance': [{'wikipedia_id': '2297349', 'title': 'Ichigo Kurosaki', 'start_paragraph_id': 14, 'start_character': 872, 'end_paragraph_id': 14, 'end_character': 880, 'bleu_score': 1.0, 'section': 'Section::::Appearances.:In "Bleach".\n'}]}, {'provenance': [{'wikipedia_id': '2297349', 'title': 'Ichigo Kurosaki', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1760, 'bleu_score': 0.9933221103007441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9154929987466419273}, 'section': 'Section::::Reception.\n'}]}]