Question: what date did canada declare war on germany
[{'answer': 'September 10', 'provenance': [{'wikipedia_id': '31858697', 'title': 'Declaration of war by Canada', 'start_paragraph_id': 5, 'start_character': 161, 'end_paragraph_id': 5, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Second World War.:Germany.\n'}]}, {'provenance': [{'wikipedia_id': '31858697', 'title': 'Declaration of war by Canada', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 618, 'bleu_score': 0.9813933169956551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8303701826870463665}, 'section': 'Section::::Second World War.:Germany.\n'}]}]