Question: who did the united states support when vietnam first split into north and south vietnam
[{'answer': 'South Vietnamese army', 'provenance': [{'wikipedia_id': '32611', 'title': 'Vietnam War', 'start_paragraph_id': 35, 'start_character': 594, 'end_paragraph_id': 35, 'end_character': 615, 'bleu_score': 1.0, 'section': 'Section::::Diệm era, 1954–63.:Insurgency in the South, 1954–60.\n'}]}, {'provenance': [{'wikipedia_id': '32611', 'title': 'Vietnam War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 733, 'bleu_score': 0.6397364383319041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17674578237940183818}, 'section': 'Section::::Abstract.'}]}]