Question: when was the first transatlantic telephone cable service opened
[{'answer': 'September 25 , 1956', 'provenance': [{'wikipedia_id': '42704', 'title': 'Transatlantic communications cable', 'start_paragraph_id': 4, 'start_character': 238, 'end_paragraph_id': 4, 'end_character': 257, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '42704', 'title': 'Transatlantic communications cable', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 946, 'bleu_score': 0.9276330262418001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3047358033509119993}, 'section': 'Section::::History.\n'}]}]