Question: when did the chargers move from san diego to los angeles
[{'answer': '2016', 'provenance': [{'wikipedia_id': '9984506', 'title': 'History of the San Diego Chargers', 'start_paragraph_id': 14, 'start_character': 46, 'end_paragraph_id': 14, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::AFL era (1961 1970).:1961 1966.:San Diego.\n'}]}]