Question: when did the us start using in god we trust
[{'answer': '1956', 'provenance': [{'wikipedia_id': '324398', 'title': 'In God We Trust', 'start_paragraph_id': 1, 'start_character': 164, 'end_paragraph_id': 1, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '324398', 'title': 'In God We Trust', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 340, 'bleu_score': 0.858850064700812, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3193965549588930940}, 'section': 'Section::::Abstract.'}]}]