Question: what is the symbol for parts per thousand
[{'answer': 'per mille', 'provenance': [{'wikipedia_id': '248896', 'title': 'Per mille', 'start_paragraph_id': 1, 'start_character': 2, 'end_paragraph_id': 1, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '248896', 'title': 'Per mille', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 207, 'bleu_score': 0.855530866466304, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13617737329283128562}, 'section': 'Section::::Abstract.'}]}]