Question: when was the city of los angeles founded
[{'answer': 'September 4 , 1781', 'provenance': [{'wikipedia_id': '18110', 'title': 'Los Angeles', 'start_paragraph_id': 10, 'start_character': 134, 'end_paragraph_id': 10, 'end_character': 152, 'bleu_score': 1.0, 'section': 'Section::::History.:Spanish rule.\n'}]}, {'provenance': [{'wikipedia_id': '18110', 'title': 'Los Angeles', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 847, 'bleu_score': 0.9687635332632951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1433487681906785471}, 'section': 'Section::::Abstract.'}]}]