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: Hungarian sources from 1288 make notice of one Russian named Ivan (Iwan dicto Oroz) as an ally of the ban of Severin, Theodore Vejtehi from the kindred Csan*d, who was one of the nobles that opposed the rule of Charles I of Hungary in 1316--1317. The land to the south of Severin was governed for Bulgaria by the despot of Vidin, Michael Shishman, a supporter of Vejtehi. Thus, as the Hungarian king established _his_ authority over Severin and suppressed Vejtehi's rebellion, Ivan the Russian may have fled to Vidin and entered the service of Michael Shishman. <sep>, Pronoun: his <sep>, A: Severin <sep>, B: Vejtehi

Neither