Question: why isn't there a bridge between england and france
[{'answer': 'cost', 'provenance': [{'wikipedia_id': '1814556', 'title': 'Transatlantic tunnel', 'start_paragraph_id': 3, 'start_character': 52, 'end_paragraph_id': 3, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'limits of current materials science', 'provenance': [{'wikipedia_id': '1814556', 'title': 'Transatlantic tunnel', 'start_paragraph_id': 3, 'start_character': 126, 'end_paragraph_id': 3, 'end_character': 161, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1814556', 'title': 'Transatlantic tunnel', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 371, 'bleu_score': 0.9657992495762461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4816218965006194329}, 'section': 'Section::::Abstract.'}]}]