Given the task definition, example input & output, solve the new input case.
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.
Example: He grew up in Evanston, Illinois the second oldest of five children including his brothers, Fred and Gordon and sisters, Marge (Peppy) and Marilyn. His high school days were spent at New Trier High School in Winnetka, Illinois. MacKenzie studied with Bernard Leach from 1949 to 1952. _His_ simple, wheel-thrown functional pottery is heavily influenced by the oriental aesthetic of Shoji Hamada and Kanjiro Kawai. <sep>, Pronoun: His
Output: MacKenzie
Based on the text, his refers to MacKenzie.

New input case for you: He continued to write fiction, and in 1915 published his most famous work, The Thirty-Nine Steps, a spy-thriller set just prior to World War I. The novel featured Buchan's oft used hero, Richard Hannay, whose character was based on Edmund Ironside, a friend of Buchan from his days in South Africa. A sequel, Greenmantle, came the following year. Buchan then enlisted in the British Army and was commissioned as a second lieutenant in the Intelligence Corps, where he wrote speeches and communiqu*s for Sir Douglas Haig. Recognised for _his_ abilities, Buchan was appointed as the Director of Information in 1917, under Lord Beaverbrook--which Buchan said was ''the toughest job I ever took on''--and also assisted Charles Masterman in publishing a monthly magazine detailing the history of the war, the first edition appearing in February 1915 (and later published in 24 volumes as Nelson's History of the War). <sep>, Pronoun: his
Output:
Buchan