Question: when did the gold foil experiment take place
[{'answer': 'between 1908 and 1913', 'provenance': [{'wikipedia_id': '319834', 'title': 'Geiger–Marsden experiment', 'start_paragraph_id': 1, 'start_character': 394, 'end_paragraph_id': 1, 'end_character': 415, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '319834', 'title': 'Geiger–Marsden experiment', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 551, 'bleu_score': 0.9382880328341491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10799279508855582657}, 'section': 'Section::::Abstract.'}]}]