Question: how many british soldiers died in the vietnam war
[{'answer': '~ 1', 'provenance': [{'wikipedia_id': '1449184', 'title': 'Vietnam War casualties', 'start_paragraph_id': 2, 'start_character': 22, 'end_paragraph_id': 2, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]