Question: who decided to use agent orange in vietnam
[{'answer': 'President John F. Kennedy', 'provenance': [{'wikipedia_id': '2547', 'title': 'Agent Orange', 'start_paragraph_id': 18, 'start_character': 191, 'end_paragraph_id': 18, 'end_character': 216, 'bleu_score': 1.0, 'section': 'Section::::Early use.\n'}]}, {'answer': 'President Ngo Dinh Diem of South Vietnam'}, {'provenance': [{'wikipedia_id': '2547', 'title': 'Agent Orange', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 659, 'bleu_score': 0.9812185674664711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 185971743008038261}, 'section': 'Section::::Use in the Vietnam War.\n'}]}]