Question: where was the first hard rock cafe in us
[{'answer': 'Los Angeles', 'provenance': [{'wikipedia_id': '251762', 'title': 'Hard Rock Cafe', 'start_paragraph_id': 5, 'start_character': 86, 'end_paragraph_id': 5, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::History.:Restaurants.\n'}]}]