Question: when was the immigration act passed in canada
[{'answer': '1923', 'provenance': [{'wikipedia_id': '986940', 'title': 'Chinese Immigration Act, 1923', 'start_paragraph_id': 0, 'start_character': 25, 'end_paragraph_id': 0, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '986940', 'title': 'Chinese Immigration Act, 1923', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 330, 'bleu_score': 0.945005232037271, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9512190463171946390}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '986940', 'title': 'Chinese Immigration Act, 1923', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9512190463171946390}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '986940', 'title': 'Chinese Immigration Act, 1923', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 507, 'bleu_score': 0.9738505480425671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9512190463171946390}, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '986940', 'title': 'Chinese Immigration Act, 1923', 'section': 'Section::::History.\n', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ['the "Chinese Immigration Act" was passed. It went into effect on July 1, 1923. The "Act" banned Chinese immigrants from entering Canada', 'It went into effect on July 1, 1923. The "Act" banned Chinese immigrants from entering Canada except those under the following titles', 'Before 1923, Chinese immigration was heavily controlled by the "Chinese Immigration Act" of 1885']}}]}, {'provenance': [{'wikipedia_id': '986940', 'title': 'Chinese Immigration Act, 1923', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The Chinese Immigration Act, 1923, known today as the Chinese Exclusion Act, (the "Act") was an act passed by the Parliament of Canada, banning most forms of Chinese immigration to Canada.', 'The Chinese Immigration Act, 1923, known today as the Chinese Exclusion Act, (the "Act") was an act passed by the Parliament of Canada, banning most forms of Chinese immigration to Canada', 'The Chinese Immigration Act, 1923, known today as the Chinese Exclusion Act, (the "Act")']}}]}]