Question: where did the us first attack in ww1
[{'answer': 'The Battle of Cantigny', 'provenance': [{'wikipedia_id': '8562836', 'title': 'Battle of Cantigny', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8562836', 'title': 'Battle of Cantigny', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 536, 'bleu_score': 0.9788329837059241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2417662572998420330}, 'section': 'Section::::Abstract.'}]}]