Question: where is comic con held in san diego
[{'answer': 'San Diego Convention Center', 'provenance': [{'wikipedia_id': '843158', 'title': 'San Diego Comic-Con', 'start_paragraph_id': 2, 'start_character': 310, 'end_paragraph_id': 2, 'end_character': 337, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]