Question: What is the networth of the CEO of the company that formerly owned the Omaha Sun newspaper?

full_context: Document 1: Berkshire Hathaway: Berkshire Hathaway Inc. is an American multinational conglomerate holding company headquartered in Omaha, Nebraska, United States. The company wholly owns GEICO, Long & Foster, BNSF Railway, Lubrizol, Fruit of the Loom, Helzberg Diamonds, FlightSafety International, Pampered Chef, and NetJets, and also owns 26.7% of the Kraft Heinz Company, and significant minority holdings in American Express (17.15%), The Coca-Cola Company (9.4%), Wells Fargo (9.9%), IBM (6.9%) and Apple (2.5%). Since 2016, the company has acquired large holdings in the major US airline carriers and is currently the largest shareholder in United Airlines and Delta Air Lines and a top 3 shareholder in Southwest Airlines and American Airlines. Berkshire Hathaway has averaged an annual growth in book value of 19.0% to its shareholders since 1965 (compared to 9.7% from the S&P 500 with dividends included for the same period), while employing large amounts of capital, and minimal debt.
Document 2: Peter Buffett: Peter Andrew Buffett (born May 4, 1958) is an American musician, composer, author and philanthropist. With an acclaimed career that spans more than 30 years, Peter is an Emmy Award winner, New York Times best-selling author and co-chair of the NoVo Foundation. He is the youngest son of billionaire investor Warren Buffett.
Document 3: Warren Buffett: Warren Edward Buffett ( ; born August 30, 1930) is an American business magnate, investor, and philanthropist. Buffett serves as the Chief Executive Officer and Chairman of Berkshire Hathaway. He is considered by some to be one of the most successful investors in the world, and as of August 2017 is the second wealthiest person in the United States, and the fourth wealthiest in the world, with a total net worth of $76.9 billion.
Document 4: Newshold: Newshold SGPS is a Luso-Angolan media group, owned by Pineview Overseas, a Panama-based company, whose shareholders are powerful Angolan figures including tycoon Alvaro Sobrinho, who represents the Madalena family in this group. The company headquarters is in Lisbon. It has a share of 15.08% in Cofina, which owns the daily sales leader, the "Correio da Manhã", the largest-circulation Lisbon based tabloid. Newshold controls 97% of "Sol", Portugal's third largest weekly newspaper, fully owns daily newspaper "i" and owns minor stakes in two leading magazines, "Visão" and "Expresso".
Document 5: Sun (supermarket tabloid): Sun was a supermarket tabloid owned by American Media, Inc. It ceased publication in the summer of 2012 with the issue bearing a July 2, 2012 cover date.
Document 6: Ottawa Sun: The Ottawa Sun is a daily tabloid newspaper in Ottawa, Ontario, Canada. It is published by Sun Media. It was first published in 1983 as the "Ottawa Sunday Herald", until it was acquired by (then) Toronto Sun Publishing Corporation in 1988. In April 2015, Sun Media papers were acquired by Postmedia.
Document 7: B. Wayne Hughes: Bradley Wayne Hughes (born September 28, 1933) is the founder and chairman of Public Storage, the largest self-storage company in America doing business as a REIT or real estate investment trust. As of 2014, Hughes is worth $2.2 billion. Known all his life by his middle name, B. Wayne Hughes was the company's President and Co-Chief Executive Officer from 1980 until November 1991 when he became Chairman of the Board and sole Chief Executive Officer. He retired as Chief Executive Officer in November 2002 and remains Chairman of the Board. He was Chairman of the Board and Chief Executive Officer from 1990 until March 1998 of Public Storage Properties XI, Inc., which was renamed PS Business Parks, Inc. ("PSB"), an affiliated REIT. From 1989-90 until the respective dates of merger, he was Chairman of the Board and Chief Executive Officer of 18 affiliated REITs that were merged into the Company between September 1994 and May 1998 (collectively, the "Merged Public Storage REITs"). has been active in the real estate investment field for over 30 years.
Document 8: The Buffalo News: The Buffalo News is the daily newspaper of the Buffalo–Niagara Falls metropolitan area, located at 1 News Plaza in Downtown Buffalo, New York. The paper is owned by Warren Buffett's Berkshire Hathaway. It was for decades the only newspaper fully owned by that company.
Document 9: Edward G. Chace: Edward Gould Chase (1882–1935) was an American businessman and an entrepreneur in textile manufacturing. Chase led the organization of the Fort Dummer Mills in Brattleboro, Vermont, a cotton mill, and he served as the founding manager. He also served as a vice president and the treasurer of Berkshire Fine Spinning Associates, a predecessor of Berkshire Hathaway.
Document 10: Li Ka-shing: Sir Ka-shing Li, GBM, KBE, JP (born 29 July 1928 in Chaozhou, China) is a Hong Kong business magnate, investor, and philanthropist. As of September 2017, Li is one of the wealthiest people in Asia, with an estimated net worth of US$34.4 billion. He is currently the chairman of the board for CK Hutchison Holdings; through it, he is the world's leading port investor, developer, and operator, and the largest health and beauty retailer in Asia and Europe.
Document 11: Richard Santulli: Richard T. Santulli (born August 14, 1944), is an American entrepreneur and philanthropist. He is best known for pioneering the concept of fractional jet ownership with NetJets, a successful company he developed in 1986. Santulli was once considered by analysts as a possible successor to Warren Buffett at Berkshire Hathaway. He currently serves as Chairman of his latest venture, Milestone Aviation Group, a helicopter and business jet leasing company.
Document 12: Las Vegas Sun: The Las Vegas Sun is one of the Las Vegas Valley's two daily newspapers. It is owned by the Greenspun family and is affiliated with Greenspun Media Group. The paper published afternoons on weekdays from 1990 to 2005 and is now included as a section inside the pages of the "Las Vegas Review-Journal" but continues operating exclusively on its own website.
Document 13: Phil Knight: Philip Hampson Knight (born February 24, 1938) is an American business magnate and philanthropist. A native of Oregon, he is the co-founder and chairman "emeritus" of Nike, Inc., and previously served as chairman and CEO of the company. In November 2015, Forbes named Knight the 15th richest person in the world, with an estimated net worth of US$28.1 billion. He is also the owner of the stop motion film production company Laika.
Document 14: George Soros: George Soros ( or ; Hungarian: "Soros György" , ] ; born György Schwartz, August 12, 1930) is a Hungarian-American investor, business magnate, philanthropist, and author. Soros is one of the world's most successful investors. As of May 2017, he had a net worth of $25.2 billion, ranking among the 30 richest people in the world.
Document 15: Omaha Sun: The Omaha Sun was a weekly newspaper that published from December 27, 1951 to August 31, 1983. It was formerly owned by Berkshire Hathaway, a company headed by investor Warren Buffett.
ground_truth: $76.9 billion