Question: why did the us support several coups in south vietnam during the 1960s
[{'answer': 'had lost confidence in Khánh', 'provenance': [{'wikipedia_id': '28241578', 'title': '1965 South Vietnamese coup', 'start_paragraph_id': 1, 'start_character': 729, 'end_paragraph_id': 1, 'end_character': 757, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28241578', 'title': '1965 South Vietnamese coup', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 757, 'bleu_score': 0.985238839858627, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1938552429375965727}, 'section': 'Section::::Abstract.'}]}]