Question: when did the first episode of one piece air
[{'answer': 'October 20 , 1999', 'provenance': [{'wikipedia_id': '3828418', 'title': 'List of One Piece episodes (seasons 1–8)', 'start_paragraph_id': 1, 'start_character': 237, 'end_paragraph_id': 1, 'end_character': 256, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3828418', 'title': 'List of One Piece episodes (seasons 1–8)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 624, 'bleu_score': 0.9491353855517691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15173310125962074794}, 'section': 'Section::::Abstract.'}]}]