Question: where is the longest bridge in the united states located
[{'answer': 'southern Louisiana', 'provenance': [{'wikipedia_id': '907752', 'title': 'Lake Pontchartrain Causeway', 'start_paragraph_id': 1, 'start_character': 142, 'end_paragraph_id': 1, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '907752', 'title': 'Lake Pontchartrain Causeway', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 355, 'bleu_score': 0.873294914575339, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3541748163125432941}, 'section': 'Section::::Abstract.'}]}]