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: Cases of HSP may occur anytime throughout the year, but some studies have found that fewer cases occur during the summer months. The disease is named after Eduard Heinrich Henoch (1820--1910), a German pediatrician (nephew of Moritz Heinrich Romberg) and _his_ teacher Johann Lukas Sch*nlein (1793--1864), who described it in the 1860s. <sep>, Pronoun: his <sep>, A: Eduard Heinrich Henoch <sep>, B: Moritz Heinrich Romberg
Output:
A