Detailed Instructions: In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.
Problem:Sentence: Then , built by the LNWR , the branch line to Ashbourne was opened in 1899 . 
 Question: who   built something?
Solution:
LNWR