You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.

Sentence: The museums display unique artifacts and paintings from the 5th century CE to the present day, including archeological exportation.
Question: From what time period are the oldest artifacts in Kathmandu museums?
5th century CE.