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: This collection of around 45,000 books is derived from a personal collection of Kaiser Shamsher Jang Bahadur Rana. 
Question: Who did the Kaiser Library's books previously belong to?
Kaiser Shamsher Badadur Rana.