Question: when was the words under god added to the pledge of allegiance
[{'answer': 'June 14 , 1954', 'provenance': [{'wikipedia_id': '59581', 'title': 'Pledge of Allegiance', 'start_paragraph_id': 36, 'start_character': 230, 'end_paragraph_id': 36, 'end_character': 244, 'bleu_score': 1.0, 'section': 'Section::::Music.\n'}]}, {'provenance': [{'wikipedia_id': '59581', 'title': 'Pledge of Allegiance', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 167, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6224806727959602820}, 'section': 'Section::::Changes.:Addition of "under God".\n'}]}]