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.

Example Input: Sentence: A Fifth order Fresnel lens manufactured by Parisian glass makers Barbier and Fenestre was installed in the lantern . 
 Question: what was  manufactured?
Example Output: A Fifth order Fresnel lens

Example Input: Sentence: He is known for his work playing the Native American flute , and has been a successful Indian dancer , and has sung in a popular blues band . 
 Question: what has someone sung  in?
Example Output: a popular blues band .

Example Input: Sentence: On the run , she develops a revolutionary new theory of quantum cognition , which she writes down in a little black book . 
 Question: who   writes  down something?
Example Output:
she