Question: What was the politician's position that was in the biography Percy Jackson wrote?

Context paragraphs:
Percy Jackson: Sea of Monsters: Percy Jackson: Sea of Monsters (also known as Percy Jackson & the Olympians: The Sea of Monsters) is a 2013 American fantasy adventure film directed by Thor Freudenthal.  It is the second installment in the "Percy Jackson" film series and is loosely based on the novel "The Sea of Monsters" by Rick Riordan.  It is a stand-alone sequel to the 2010 film "".

Percy Jackson (disambiguation): Percy Jackson is the title character and narrator of Rick Riordan's "Percy Jackson & the Olympians" series.

Percy Jackson's Greek Gods: Percy Jackson's Greek Gods is a collection of short stories about Greek mythology as narrated by Percy Jackson.  It was written by Rick Riordan and was released on August 19, 2014.  It features Percy Jackson giving his own take on the Greek myths in a humorous way.

Robert Menzies: Sir Robert Gordon Menzies, {'1': ", '2': ", '3': ", '4': "} (20 December 189415 May 1978), was the Prime Minister of Australia from 1939 to 1941 and again from 1949 to 1966.  He is Australia's longest-serving prime minister, serving over 18 years in total.

The Demigod Files: The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009.  It is a companion book to series "Percy Jackson & the Olympians".  It contains three short stories, titled "Percy Jackson and the Stolen Chariot", "Percy Jackson and the Bronze Dragon", and "Percy Jackson and the Sword of Hades", as well as a preview of "The Last Olympian".  It is set between the fourth and fifth novels, "The Battle of the Labyrinth" and "The Last Olympian".

The Lightning Thief: The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by American author Rick Riordan.  It is the first novel in the "Percy Jackson & the Olympians" series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a demigod, the son of a mortal woman and the Greek god Poseidon.  Percy and his friends Annabeth Chase and Grover Underwood go on a quest to prevent a war between the gods Zeus, Poseidon, and Hades.

The Last Olympian: The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009.  It is the fifth and final novel of the "Percy Jackson & the Olympians" series and serves as the direct sequel to "The Battle of the Labyrinth".  "The Last Olympian" revolves around the demigod Percy Jackson as he leads his friends in a last stand to protect Mount Olympus.  The title refers to Hestia, the goddess of the hearth, who refers to herself as such in a conversation with Percy on Mount Olympus.

Percy Jackson: Perseus "Percy" Jackson is a fictional character, the title character and narrator of Rick Riordan's "Percy Jackson & the Olympians" series.  He is also one of seven main protagonists of the sequel series "The Heroes of Olympus", appearing in every book except "The Lost Hero," and appears in the ongoing "Trials of Apollo" series, making him one of the few characters to appear in all three series of the Camp Half-Blood chronicles.  He has also been a narrator and protagonist in Riordan's Greco-Roman/Egyptian crossover stories, part of the "Demigods and Magicians" collection.  The character serves as the narrator in "Percy Jackson's Greek Gods" and "Percy Jackson's Greek Heroes", also by Rick Riordan.

Camp Half-Blood chronicles: Camp Half-Blood Chronicles is a media franchise created by author Rick Riordan, encompassing three five-part novel series, three short-story collections, two myth anthology books, a stand-alone short story, an essay collection, a guide, four graphic novels, two films, a video game, a musical, and other media.  Set in the modern world, it focuses on groups of demi-god teenagers, and features many characters from Greek and Roman mythology.  The first series, "Percy Jackson & the Olympians", follows the adventures of a teen named Percy Jackson at a summer camp for Greek demigods.  The second series, "The Heroes of Olympus", introduces several more lead characters and a second camp for Roman demigods.  The third series, "The Trials of Apollo", follows the now-mortal god Apollo, with appearances by many characters from the first and second series.

Percy Joske: Sir Percy Ernest Joske, CMG (5 October 1895 – 25 April 1981) was an Australian politician.  Born in Melbourne, he attended Wesley College and then the University of Melbourne before being called to the bar in 1917.  He served in the military 1943-45, and returned to become a law lecturer at the University of Melbourne, a position he held from 1949 to 1952.  He was also an author.  In 1951, he was elected to the Australian House of Representatives as the Liberal member for the blue-ribbon seat of Balaclava, being elected in the by-election following the resignation of Thomas White.  Joske resigned in 1960 to become Judge of the Commonwealth Industrial Court.  He was subsequently appointed to the Supreme Court of the Australian Capital Territory (1960–77) and the Supreme Court of the Northern Territory (1961–77).  He was knighted in 1967, and died in 1981; a year before his death, he published a biography of Sir Robert Menzies.

Supporting paragraphs: Percy Joske Robert Menzies
Answer: Prime Minister