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: The third is the presence of a community ; small and stable populations with a thick social network and social norms promoting conservation do better . 
 Question: what does something promote?
Example Output: conservation

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

Example Input: Sentence: `` American Guru : A Story of Love , Betrayal and Healing '' , by William Yenner and other former Cohen student contributors , allege authoritarianism , financial manipulation , physical and psychological abuse in Cohen 's community , and discusses the challenges of healing after leaving the community . 
 Question: who are  discussing something?
Example Output:
William Yenner and other former Cohen student contributors