Definition: In this task, you will be presented with a text, a pronoun from the text, and two candidate names. You should determine what the pronoun refers to and classify the answers into A, B, or Neither. A and B here are referring to option A and option B. Position of the pronoun in the text is showed within two "_"s.
Input: After Chu died in 719 and Yuan died in 729, Emperor Xuanzong engaged Chen Xilie and F*ng Ch*oy*n (***) to frequently explain the Tao Te Ching and the I Ching to him. Chen was initially promoted to be M*sh* Sh*oji*n (****), the deputy head of the Palace Library, and also succeeded Zhang Jiuling in heading the imperial institute J*xi*n Institute (***). Whenever Emperor Xuanzong was writing something of importance, Chen would assist _him_ in drafting the language. <sep>, Pronoun: him <sep>, A: Emperor Xuanzong <sep>, B: Chen
Output:
A