Question: What city is the company that funds Tekzilla based in?

Context paragraphs:
Patreon: Patreon ( ) is a membership platform that provides business tools for creators to run a subscription content service, as well as ways for artists to build relationships and provide exclusive experiences to their subscribers, or "patrons."  It is popular among YouTube videographers, webcomic artists, writers, podcasters, musicians, and other categories of creators who post regularly online.  It allows artists to receive funding directly from their fans, or patrons, on a recurring basis or per work of art.  The company, started by musician Jack Conte and developer Sam Yam in 2013, is based in San Francisco.

Tekzilla: Tekzilla was an American video podcast on the Revision3 network ("Tekzilla" was released every Tuesday).  It was hosted by Patrick Norton and Shannon Morse, with Roger Chang (who also acts as the show's producer) as a frequent guest host.  For the first 14 episodes of "Tekzilla", Patrick's co-host was Jessica Corbin, who made a guest appearance on episode 16 confirming she has left the show.  In November 2013, Veronica Belmont left the show.  She had been a host on Tekzilla since 2008.  Shannon Morse became the new host.  On November 25, 2014, Tekzilla aired for the final time.  Starting in January 2015, Patrick Norton and Shannon Morse went on to create and host TekThing, funded by Patreon and recorded in the Hak5 studio.

Universal Investment: Universal-Investment-Gesellschaft mbH is an investment company based in Frankfurt am Main.  With 314 billion Euro assets under management, 1,000 institutional funds and private label funds and more than 650 employees Universal-Investment is one of the leading German investment firms.  In 2014, the company ranked third, after Allianz Global Investors and DWS/DeAWM and before DekaBank.  Universal-Investment offers primarily the administration of investment funds and securities for institutional investors.

National City acquisition by PNC: The National City acquisition by PNC was the deal by PNC Financial Services to acquire National City Corp. on October 24, 2008 following National City's untenable loan losses during the subprime mortgage crisis.  The deal received much controversy due to PNC using TARP funds to buy National City only hours after accepting the funds while National City itself was denied funds, as well as civic pride for the city of Cleveland, Ohio, where National City was based.

Closed-end fund: A closed-end fund (CEF) or closed-ended fund is a collective investment model based on issuing a fixed number of shares which are not redeemable from the fund.  Unlike open-end funds, new shares in a closed-end fund are not created by managers to meet demand from investors.  Instead, the shares can be purchased and sold only in the market.  This is the original design of the mutual fund which predates open-end mutual funds but offers the same actively managed pooled investments.  In the United States, closed-end funds sold publicly must be registered under both the Securities Act of 1933 and the Investment Company Act of 1940.

Quantum Group of Funds: The Quantum Group of Funds are privately owned hedge funds based in Curaçao (Netherlands Antilles) and Cayman Islands.  They are advised by George Soros through his company Soros Fund Management.  Soros started the fund in 1973 in partnership with Jim Rogers.  The shareholders of the funds are not publicly disclosed although it is known that the Rothschild family and other wealthy Europeans put $6 million into the funds in 1969.

Fond commun de placement: Fonds commun de placement translates to "investment funds" or "mutual funds", and are open-ended collective investment funds based that are neither trust or company law based.  They are similar to Common contractual funds in Ireland.

Castlestone Management: Castlestone Management Inc., established in 1996, is an independently owned asset manager based in the British Virgin Islands.  The firm’s distribution service provider has offices in Hong Kong, London,and Chichester.  Commodities take up the bulk of the funds managed by the company, with a focus on real assets such as gold bullion and precious metals.  In 2010 Castlestone launched a Next 11 Emerging Markets fund and more recently, Equity High Yield & Premium Income Fund.  The firm places emphasis on the long term, investing in asset classes and funds likely to outperform over a 10-year period, with the goal of protecting investors against the devaluation of money over time.  According to Castlestone Management's investment philosophy, the company aims to provide funds that are liquid, transparent, do not use leverage and only hold liquid instruments.

TIM Group: TIM Group is a privately owned technology company, developing and operating web-based solutions for the financial services industry, based in The City of London.  TIM Group's solutions are used by investment banks, brokerage firms, hedge funds, asset managers, and funds of hedge funds (FoHF) in the US, Europe and the Far East.

United States Commodity Funds: United States Commodity Funds LLC (USCF) is a US company based in Oakland, CA, specializing in managing exchange-traded commodity funds, which are often referred to as commodity-based exchange-traded funds (ETFs).  USCF was one of the earliest issuers of exchange-traded commodity funds in the United States.  It is best known for launching in 2006 the first crude oil based exchange traded commodity fund in the United States, United States Oil Fund, LP (ticker: USO), as well as launching in 2007 the first natural gas exchange traded commodity fund, United States Natural Gas Fund, LP (ticker: UNG).  USO and UNG are two of the most actively traded ETFs in the United States.  s of 30, 2016 , USCF managed eleven different exchange traded commodity funds with total assets of approximately $5 billion.

Supporting paragraphs: Tekzilla Patreon
Answer: San Francisco