Question: which soldier was awarded the param vir chakra after he was martyred during a un peacemaking mission
[{'answer': 'Captain Gurbachan Singh Salaria', 'provenance': [{'wikipedia_id': '5064132', 'title': 'Gurbachan Singh Salaria', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]