Task: Question Answering
Input (English): 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   alleged something?
Output (English): William Yenner and other former Cohen student contributors