Question: when did soft drinks first come in cans
[{'answer': '1964', 'provenance': [{'wikipedia_id': '383115', 'title': 'Drink can', 'start_paragraph_id': 65, 'start_character': 779, 'end_paragraph_id': 65, 'end_character': 783, 'bleu_score': 1.0, 'section': 'Section::::Opening mechanisms.:Pop-tab.\n'}]}, {'provenance': [{'wikipedia_id': '383115', 'title': 'Drink can', 'start_paragraph_id': 65, 'start_character': 0, 'end_paragraph_id': 65, 'end_character': 783, 'bleu_score': 0.9419576258451021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11214355314421431276}, 'section': 'Section::::Opening mechanisms.:Pop-tab.\n'}]}]