Definition: In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).
Input: Context: William Richard "Bill" Shorten (born 12 May 1967) is an Australian politician who is the current Leader of the Opposition in the Parliament of Australia, in his capacity as Leader of the Australian Labor Party, after being elected party leader at the 2013 Labor leadership ballot. Shorten led Labor at the 2016 federal election at which the Liberal/National Coalition retained majority government. , Federal elections were held in Australia on 1 December 1984 . All 148 seats in the House of Representatives ( 24 of them newly created ) , and 46 of 76 seats in the Senate ( 12 of them newly created ) , were up for election . The incumbent Australian Labor Party led by Prime Minister Bob Hawke , defeated the opposition Liberal Party of Australia led by Andrew Peacock with coalition partner the National Party of Australia led by Ian Sinclair . The election was held in conjunction with two referendum questions , neither of which was carried ., Ian McMahon Sinclair (born 10 June 1929) is a retired Australian politician. During his career he was leader of the National Party of Australia and later Speaker of the House of Representatives., Robert James Lee "Bob" Hawke (born 9 December 1929) is an Australian politician who was the Prime Minister of Australia and the Leader of the Labor Party from 1983 to 1991., The Australian Labor Party (ALP, also Labor, was Labour before 1912) is a political party in Australia. The party has been in opposition at federal level since the 2013 election. Bill Shorten has been the party's federal parliamentary leader since 13 October 2013. The party is a federal party with branches in each state and territory. Labor is in government in the states of Victoria, Queensland, South Australia, and in the Australian Capital Territory and Northern Territory. The party competes against the Liberal/National Coalition for political office at the federal and state (and sometimes local) levels., The Prime Minister of the Commonwealth of Australia is the head of government in Australia. The individual who holds the office is the most senior Minister of the Crown, the leader of the Cabinet and the chairperson of the National Security Committee. The office is not mentioned in the Constitution of Australia and exists only through an unwritten political convention and tradition. Despite this, in practice it is the most powerful parliamentary position in Australia. The individual who holds the office is commissioned by the Governor-General of Australia., Subject: australian federal election, Relation: office_contested, Options: (A) chairperson (B) leadership (C) prime minister (D) prime minister of australia (E) speaker
Output:
prime minister of australia