TASK DEFINITION: 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: On many of the construction sites German prisoners of war were working together with Belarusian construction workers . 
 Question: where did someone work?

SOLUTION: On many of the construction sites

PROBLEM: Sentence: Having finished his apprenticeship with Hammond , Keats registered as a medical student at Guy 's Hospital and began studying there in October 1815 . 
 Question: what did someone register  as?

SOLUTION: a medical student

PROBLEM: Sentence: The city saw construction of skyscrapers in the skyline . 
 Question: what   saw something?

SOLUTION:
The city