Question: when did the temporary foreign worker program start
[{'answer': '1973', 'provenance': [{'wikipedia_id': '42027681', 'title': 'Temporary foreign worker program in Canada', 'start_paragraph_id': 1, 'start_character': 170, 'end_paragraph_id': 1, 'end_character': 174, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42027681', 'title': 'Temporary foreign worker program in Canada', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 572, 'bleu_score': 0.978606533029418, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16262641818362806562}, 'section': 'Section::::Abstract.'}]}]