Detailed Instructions: In this task, given a sentence in the English language, your task is to convert it into the Khmer language.
Problem:It is not yet known who was responsible for the attack on the UN convoy.
Solution:
គេមិនទាន់ដឹងទេថានរណាជាអ្នកទទួលខុសត្រូវលើការវាយប្រហារទៅលើក្បួនរថយន្តUNទេ។