Question: What is the name of the current Leader of the Opposition in the Parliament of Australia, who married the granddaughter of Sir Oliver Howard Beale?

Context paragraphs:
Leader of the Opposition (Solomon Islands): The Leader of the Opposition (or Leader of the Official Opposition) in Solomon Islands is a Member of Parliament who commands a large minority of his peers, united in loyal opposition to government.  The title of "Leader of the Opposition" is common to the Commonwealth realms and several other Commonwealth countries, though in Solomon Islands it is specifically defined by the Constitution.  The Leader of the Opposition appoints and leads a Shadow Cabinet.  The current Leader of the Opposition, since December 2014, is Jeremiah Manele.

Sir Oliver Mowat Collegiate Institute: Sir Oliver Mowat Collegiate Institute (Sir Oliver Mowat CI, SOMCI, or Mowat) is a public high school located in Toronto, located in south east Scarborough governed by the Scarborough Board of Education until 1998 when it became the part of the newly formed Toronto District School Board.  Its motto is "De Monte Alto" ("From a mount high").

Leader of the Opposition (Nova Scotia): The Leader of the Opposition (French: "Chef de l'Opposition" ) in Nova Scotia is the MLA in the Nova Scotia House of Assembly who leads the political party recognized as the Official Opposition.  This status generally goes to the leader of the second largest party in the Legislative Assembly.  Jamie Baillie, the current leader of the Progressive Conservative Party of Nova Scotia, is the current leader of the opposition.

Howard Beale (politician): Sir Oliver Howard Beale KBE (10 December 1898 – 17 October 1983) was an Australian politician and Ambassador to the United States.  His son was Liberal Party of Australia politician Julian Beale.  His elder granddaughter, Debbie Beale, married Labor party politician Bill Shorten.

Leader of Opposition (Uganda): The Leader of Opposition (LOP) in Uganda is the title bestowed upon the elected leader of the largest political party not within the ruling government.  The Leader of Opposition appoints and heads an alternative Shadow Cabinet whose duty is to challenge and influence government legislation on the floor of Parliament The current Leader of Opposition and first Ugandan female to hold the position is Hon. Winnie Kiiza of the Forum for Democratic Change.  The Opposition in Uganda is made up of members from Forum for Democratic Change, Democratic Party, Uganda People's Congress, Congress Party and JEEMA.

Wentworth family: The members of the Wentworth family of both the U.S.A and Australia, as listed below, are descended from Thomas Wentworth and Jane, the daughter of Sir Oliver Mirfield.  Sir Oliver died about 1522.  The American Wentworths are descended from Thomas' son Oliver.  The Australian Wentworths are descended from another son Roger.  The Wentworth family, along with the Arden family, the Berkeley family and the Swinton family, is descended in the male line from pre-Norman Conquest Anglo-Saxon roots.

Bill Shorten: William Richard 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 by a single seat.

Leader of the Opposition (Western Australia): In the Australian state of Western Australia, the Leader of the Opposition is the leader of the largest minority political party or coalition of parties in the Legislative Assembly of the Parliament of Western Australia.  By convention, the leader is generally a member of the Legislative Assembly.  The current Leader of the Opposition is Mike Nahan of the Liberal Party.

The Sea Hawk: The Sea Hawk is a novel by Rafael Sabatini, originally published in 1915.  The story is set over the years 1588–1593 and concerns a retired Cornish seafaring gentleman, Sir Oliver Tressilian, who is villainously betrayed by a jealous half-brother.  After being forced to serve as a slave on a galley, Sir Oliver is liberated by Barbary pirates.  He joins the pirates, gaining the name "Sakr-el-Bahr" (the hawk of the sea), and swears vengeance against his brother.

Leader of the Opposition (Mauritius): The Leader of the Opposition (French: "Leader de l'opposition" ) of the Republic of Mauritius is the Member of Parliament who leads the Opposition party in the National Assembly.  This office is a constitutional one guaranteed by the laws of the country.  The current office holder becomes automatically 7th in the order of precedence.  The current Leader of the Opposition is Xavier-Luc Duval who was appointed by President Ameenah Gurib on December 20, 2016.

Supporting paragraphs: Howard Beale (politician) Bill Shorten
Answer: Bill Shorten