Question: What is the estimated net worth of the owner of Carinthia VII?

Context paragraphs:
Carinthia VII: The yacht Carinthia VII was built in the Lürssen Yachts yard in 2002 and refurbished in the same yard three years later.  One of the largest motor yachts in the world, it is owned by Heidi Horten, widow of the German entrepreneur Helmut Horten.

Alisher Usmanov: Alisher Burkhanovich Usmanov (Russian: Алише́р Бурха́нович Усма́нов ; Uzbek: "Alisher Usmonov" ; born 9 September 1953) is an Uzbek-born Russian business magnate.  As reported by "Forbes", in 2017, Alisher Usmanov has an estimated net worth of $15.1 billion.  The December 2013 Bloomberg Billionaires Index reported an estimated net worth of $19.6 billion, making him the 37th richest person in the world.  In May 2014, "The Sunday Times" listed him as the second richest person in the UK with an estimated fortune of £10.65bn.

List of Pakistanis by net worth: The following is a list of the richest and wealthiest Pakistani entrepreneurs sorted by order of their declared or estimated net worth.  It is extremely difficult to verify the exact figures of the net worth of some of these individuals because in Pakistan the large business conglomerates are often and typically owned jointly by sons/brothers/close relatives who collectively hold on to the cash and assets, so the financial figures usually cannot be linked to the name of one single individual only.

List of Pakistani politicians by net worth: This is the list of Pakistani politicians by net worth as per the media reports and asset declaration.  As of 2008, former president Asif Ali Zardari is the richest Pakistani politician with net worth of US$35 billion and former Prime Minister Nawaz Sharif from Sharif family is 2nd richest for having net worth of US$30 billion.  MNA Noor Alam Khan is also among the richest with assets worth US$800 million in 2013.

Robert Kuok: Robert Kuok Hock Nien (; born 6 October 1923), is a Malaysian Chinese business magnate and investor.  According to "Forbes", his net worth is estimated at $12.2 billion on July 2017, making him the richest person in Malaysia and second richest in Southeast Asia after Dhanin Chearavanont of Thailand, according to Forbes List of World Billionaires 2013 which Robert Kuok was placed 76th.  As of December 2012, according to the Bloomberg Billionaires Index, Kuok has an estimated net worth of $17.3 billion, making him the 40th richest person in the world.

Alberto Alcocer: Alberto Alcocer Torra (born December 17, 1942, in Madrid, Spain) is a Spanish businessman.  He is owner, with his cousin Alberto Cortina, of Alcor Holding, a patrimonial society owner of 12.5% of Grupo ACS, the major Spanish construction company, and of 21% of the wastebasket company, Ence.  As of March 2011, according to Forbes, he is ranked 13th richest in Spain and 993rd globally with an estimated net worth of $1.2 billion.

Asset poverty: Asset poverty is an economic and social condition that is more persistent and prevalent than income poverty.  It can be defined as a household’s inability to access wealth resources that are sufficient to provide for basic needs for a period of three months.  Basic needs refer to the minimum standards for consumption and acceptable needs.  Wealth resources consist of home ownership, other real estate (second home, rented properties, etc.), net value of farm and business assets, stocks, checking and savings accounts, and other savings (money in savings bonds, life insurance policy cash values, etc.).  Wealth is measured in three forms: net worth, net worth minus home equity, and liquid assets.  Net worth consists of all the aspects mentioned above.  Net worth minus home equity is the same except it does not include home ownership in asset calculations.  Liquid assets are resources that are readily available such as cash, checking and savings accounts, stocks, and other sources of savings.  There are two types of assets: tangible and intangible.  Tangible assets most closely resemble liquid assets in that they include stocks, bonds, property, natural resources, and hard assets not in the form of real estate.  Intangible assets are simply the access to credit, social capital, cultural capital, political capital, and human capital.

Zygmunt Solorz-Żak: Zygmunt Solorz-Żak (born Zygmunt Józef Krok, August 4, 1956) is a Polish businessman.  He is the second richest person in Poland and has repeatedly appeared on "Forbes"<nowiki>'</nowiki> ranking of the world's billionaires, with an estimated net worth around €5.77 billion.  On the "Forbes" 2016 list of the world's billionaires, he was ranked #688 with a net worth of US$2.5 billion.

Xu Ming: Xu Ming (; April 1971 – 4 December 2015) was a Chinese entrepreneur and onetime billionaire.  He was the founder of the conglomerate Dalian Shide Group, and the chairman of Dalian Shide F.C., China's top football club in the 2000s.  In 2005 "Forbes" ranked him the eighth-richest person in China, with an estimated net worth of US$1.05 billion, but his net worth declined to $690 million in 2011.  The 2013 Hurun Report estimated his wealth to be around US$490 million, ranking 676th in China.

Heidi Horten: Heidi Horten (née Jelinek; born 13 February 1941) is an Austrian billionaire, and the widow of businessman Helmut Horten.  In November 2015 "Forbes" estimated her net worth at US $2.6 billion.

Supporting paragraphs: Carinthia VII Heidi Horten
Answer: $2.6 billion