Question: when did los angeles become a sanctuary city
[{'answer': '1979', 'provenance': [{'wikipedia_id': '10511069', 'title': 'Sanctuary city', 'start_paragraph_id': 62, 'start_character': 361, 'end_paragraph_id': 62, 'end_character': 365, 'bleu_score': 1.0, 'section': 'Section::::United States.:Laws and policies by state and city.:California.\n'}]}, {'provenance': [{'wikipedia_id': '10511069', 'title': 'Sanctuary city', 'start_paragraph_id': 62, 'start_character': 0, 'end_paragraph_id': 62, 'end_character': 652, 'bleu_score': 0.9545695715275291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2018809230033531580}, 'section': 'Section::::United States.:Laws and policies by state and city.:California.\n'}]}]