Question: Houghton Wines is a subsidiary of a company with headquarters where?

Context paragraphs:
Zonin: The Zonin family has been making wine since 1821 and currently operates Italy's largest privately owned vineyard and winemaking complex.  The house produces 25 million bottles and exports its wines to 69 countries.  The company's headquarters are located in Gambellara in Vicenza province in northeastern Italy.  The Zonin family owns 4446 acre of vineyards, divided among 11 estates in seven of the country's most highly regarded winemaking regions: Piedmont, Lombardy, Veneto, Friuli, Tuscany, Apulia and Sicily.  It also owns the Barboursville Vineyards winery in Barboursville, Virginia.  The house produces a wide range of wines, many of them from varieties native to the regions in which the grapes are grown.

Kingstone Companies: Kingstone Companies, Inc., which has its headquarters in Kingston, New York, provides property and casualty insurance products through its subsidiary, Kingstone Insurance Company.  It places contracts with the third-party licensed premium finance company through its subsidiary Payments, Inc, a NYS licensed Insurance Premium Finance Company.  Kingstone Insurance Company was ranked #1 of the 81 insurers rated by the Professional Insurance Agents Association in its 2010 Company Performance Survey.  The company sells insurance products include personal lines of insurance products, general liability policies commercial automobile policies and so on through independent retail and wholesale agents and brokers.

Vivino: Vivino is an online wine community, database and mobile application where users can buy, rate and review wines.  Vivino was founded in July 2009 by Heini Zachariassen and Theis Sondergaard.  , Vivino has a wine database containing over 3 million different wines, and has 6.8 million users.  In July 2013, the database had 1 million wines.  Vivino's headquarters are in Copenhagen, Denmark, but the company also has offices in the USA, Ukraine and India.

Superior Bancorp: Superior Bancorp, and its principal subsidiary Superior Bank, was a southeastern community thrift with approximately $3.2 billion in assets in 2010.  The company was publicly held and had its corporate headquarters in Birmingham, Alabama.  Superior was founded in 1997 as The Banc Corporation.  Before its demise, the company stood as the second-largest community bank holding company in Alabama, behind Regions Financial Corporation, and third largest when including foreign-based, but locally headquartered, BBVA Compass.  The company's corporate headquarters were located in the historic John A. Hand Building on 20th Street North in downtown Birmingham, which is named after former AmSouth Bancorporation president John A. Hand.  Superior Bank had 73 branch locations including 38 in Alabama and 22 in Florida.  Superior Bank was closed by FDIC on April 15, 2011.  The bank's branches and its assets were acquired by a newly created subsidiary of Community Bancorp, operating as Superior Bank N.A.

4th &amp; B'way Records: 4th & B'way Records (pronounced and spelled out completely as Fourth and Broadway Records in the UK) was a US-based subsidiary of Island Records that specialized in street-oriented music such as hip hop.  Established in 1984, it was the flagship label of the Island Trading Company, the independent-distribution parent company of Island's other record labels that operated in the US.  However, 4th & B'way was not distributed through major-label channels—the flagship Island label was distributed by Atlantic Records at that time—until the label and distribution company were acquired by PolyGram Records in 1989, when Island Trading became a unit of PolyGram Group Distribution and was renamed Independent Label Sales (ILS).  It was also one of several US-based Island labels that were named after nearby New York City streets when Island's US headquarters were located at 14 East 4th Street in Manhattan, the same building that held the legendary Greenwich Village branch of Tower Records, and also nearby at 400 Lafayette Street.  When Island moved its headquarters to the Worldwide Plaza Building at 825 8th Avenue in 1995, where PolyGram's US headquarters were also located, the empty 4th Street offices became the headquarters of V2 Records.

Prisma Energy International: Prisma Energy International Inc., was a former subsidiary of Enron Corporation, formed in 2003 to own and manage the majority of Enron's overseas assets, formerly known as "Enron International".  Prior to its official organization, Prisma was referred to within Enron as "InternationalCo".  Enron's original bankruptcy reorganization plan, presented in early 2002, would have created a company broadly similar to Prisma (known under the working name "OpCo Energy"), but including Portland General Electric and the energy trading business, both later divested separately.  As one of the final steps in Enron's liquidation, following their 2001 bankruptcy, Prisma was sold to Ashmore Energy International Ltd., a unit of Ashmore Group Plc., in 2006.  Prisma was structured as an 'offshore' United States corporation incorporated in the British Overseas Territory of the Cayman Islands, but with its headquarters in Houston, Texas.  It served as a holding company for 15 gas and electricity businesses.  Its subsidiary, Prisma Energy International Services LLC, employed approximately 125 individuals, most at its headquarters in Houston, Texas.  Assets in which Prisma Energy managed an interest employed an additional 6,500 employees worldwide.  Following its 2006 sale to Ashmore Energy International Limited, Prisma Energy International Inc. was merged/amalgamated with Ashmore Energy International Limited with Prisma Energy being the survivor company.  In December 2006, Prisma Energy International Inc. changed its name to Ashmore Energy International and, subsequently, in May 2007 to AEI.

DB Netz: DB Netz AG is a 100%-owned subsidiary of Deutsche Bahn is a railway infrastructure provider, which owns and operates a majority of the German railway system (2005: 34,211 km).  The company was established in the course of the second stage of the German rail reform as a subsidiary of Deutsche Bahn.  DB Netz’s headquarters are in Frankfurt and it has seven regional divisions ("Regionalbereiche", RB).  The locations of its regional headquarters are Berlin (RB east), Frankfurt (RB central), Duisburg (RB west), Hanover (RB north), Karlsruhe (RB southwest), Leipzig (RB southeast) and Munich (RB south).

Houghton Wines: Houghton Wines is an Australian winery based at Middle Swan, in the Swan Valley, the focal point of the Swan District wine region of Western Australia.  A subsidiary of Accolade Wines, the company operates one of Western Australia's earliest established vineyards and wineries.

Accolade Wines: Accolade Wines is a major global wine business with headquarters in South Australia.

W. H. Allen &amp; Co.: William H. Allen and Company (est. 1835) was a bookselling and publishing business in London, England, known for issuing works related to the British colonies.  It operated from headquarters in Leadenhall Street, later moving to Waterloo Place.  Owners and staff included James P. Allen, William Ferneley Allen (d.1877), and William Houghton Allen.

Supporting paragraphs: Houghton Wines Accolade Wines
Answer: South Australia