Question: when was the day of the dead originally celebrated
[{'answer': 'beginning of summer .', 'provenance': [{'wikipedia_id': '52303', 'title': 'Day of the Dead', 'start_paragraph_id': 2, 'start_character': 295, 'end_paragraph_id': 2, 'end_character': 325, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '52303', 'title': 'Day of the Dead', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 809, 'bleu_score': 0.964583525681703, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15277828596065227607}, 'section': 'Section::::Abstract.'}]}]