Definition: In this task, you will be presented with a text and a pronoun. You should write the name that the pronoun refers to. Position of the pronoun in the text is showed within two "_"s.
Input: Soviet-Israeli cyberneticist and dissident Yuri Levada (1930--2006) -- sociologist, political scientist and the founder of the Levada Center Jerzy Niezbrzycki (1902--1968) -- captain of the Polish Army Nikolai Pirogov (1810--1881) -- originally from Moscow, this Imperial Russian doctor, considered to be the founder of field surgery, spent the later years of _his_ life in Vinnytsia. <sep>, Pronoun: his

Nikolai Pirogov