《辽史·本纪·卷二十二》
涅鲁古跃马冲出，前来交战，被近侍详稳渤海阿厮、护卫苏射杀。
涅鲁古跃马突出，将战，为渤海近侍详稳阿厮、护卫苏射杀之。
Nirugo rode out on horseback to engage in battle and was shot and killed by the bodyguard Bohai A Si, the bodyguard Su.
<s>[INST] Kindly elucidate the central themes in this passage in English: 涅鲁古跃马突出，将战，为渤海近侍详稳阿厮、护卫苏射杀之。 [/INST] Nirugo rode out on horseback to engage in battle and was shot and killed by the bodyguard Bohai A Si, the bodyguard Su.</s>
Kindly elucidate the central themes in this passage in English: 涅鲁古跃马突出，将战，为渤海近侍详稳阿厮、护卫苏射杀之。
user
Nirugo rode out on horseback to engage in battle and was shot and killed by the bodyguard Bohai A Si, the bodyguard Su.
assistant