Question: why do we get ashes on ash wed
[{'answer': 'to express grief', 'provenance': [{'wikipedia_id': '170388', 'title': 'Ash Wednesday', 'start_paragraph_id': 34, 'start_character': 33, 'end_paragraph_id': 34, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Biblical significance of ashes.\n'}]}, {'provenance': [{'wikipedia_id': '170388', 'title': 'Ash Wednesday', 'start_paragraph_id': 34, 'start_character': 0, 'end_paragraph_id': 34, 'end_character': 969, 'bleu_score': 0.8664362363793431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9367224382645924546}, 'section': 'Section::::Biblical significance of ashes.\n'}]}]