Question: when did in god we trust become our motto
[{'answer': 'July 30 , 1956', 'provenance': [{'wikipedia_id': '324398', 'title': 'In God We Trust', 'start_paragraph_id': 14, 'start_character': 433, 'end_paragraph_id': 14, 'end_character': 447, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '324398', 'title': 'In God We Trust', 'start_paragraph_id': 2, 'start_character': 21, 'end_paragraph_id': 2, 'end_character': 671, 'bleu_score': 0.9823771291847391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17271773772476404763}, 'section': 'Section::::Abstract.'}]}]