Question: when did afghanistan gain independence from great britain
[{'answer': '1919', 'provenance': [{'wikipedia_id': '1530679', 'title': 'Afghan Independence Day', 'start_paragraph_id': 1, 'start_character': 108, 'end_paragraph_id': 1, 'end_character': 112, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1530679', 'title': 'Afghan Independence Day', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 338, 'bleu_score': 0.719224953783134, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15794438193900271136}, 'section': 'Section::::Abstract.'}]}]