Question: when did the san fernando valley try to secede from los angeles
[{'answer': '2002', 'provenance': [{'wikipedia_id': '324331', 'title': 'San Fernando Valley', 'start_paragraph_id': 46, 'start_character': 127, 'end_paragraph_id': 46, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::History.:21st century.\n'}]}, {'provenance': [{'wikipedia_id': '324331', 'title': 'San Fernando Valley', 'start_paragraph_id': 46, 'start_character': 0, 'end_paragraph_id': 46, 'end_character': 616, 'bleu_score': 0.9330781069077261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14894513098500606864}, 'section': 'Section::::History.:21st century.\n'}]}]