Question: when did the canon rebel t3i come out
[{'answer': '7 February 2011', 'provenance': [{'wikipedia_id': '30778407', 'title': 'Canon EOS 600D', 'start_paragraph_id': 1, 'start_character': 96, 'end_paragraph_id': 1, 'end_character': 111, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30778407', 'title': 'Canon EOS 600D', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 404, 'bleu_score': 0.9267806344830251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4546676148208458281}, 'section': 'Section::::Abstract.'}]}]