Question: Ranked the 129th richest family in the United States, where has their son served as the co-chief executive officer of?

<P0-S0>  He served as senior vice president of The Boston Consulting Group in Los Angeles and co-leader of Boston Consulting Group Financial Services Practice in the United States. <P0-S1>  He has been an independent director of The Allstate Corporation since February 19, 2014. <P0-S2>  Mehta holds a Bachelor of Arts in economics from the London School of Economics and Masters of Business Administration from the University of Chicago. <P0-S3>  He worked at MasterCard’s U.S. region board since March 2000. <P0-S4>  He served as chairman of the board and chief executive officer of HSBC Finance Corporation from April 2005 to February 2007. <P0-S5>  He served as the chief executive officer of HSBC Bank USA, N.A. until February 2007. <P0-S6>  He served as the chief executive officer and president of TransUnion until December 31, 2012. <P0-S7>  He served as unit chairman of HSBC Holdings PLC and served as its board member since March 2005. <P0-S8>  He has been a director of Avant Credit Corporation since December 18, 2014. <P0-S9>  From May 2007 to July 2007, he served as a consultant to the board of directors at TransUnion. <P0-S10> Siddharth N. "Bobby" Mehta was former CEO and vice chairman of HSBC North America. <P0-S11>  He has been non-executive independent director at Piramal Enterprises Ltd since April 1, 2013. <P0-S12>  He has been a director of TransUnion since April 2012. <P0-S13>  Mehta served as an Advisor of TransUnion since December 31, 2012. <P0-S14>  Ltd. <SEP> <P1-S0> Carl Henry Lindner III is an American businessman. <P1-S1>  He has served as the co-chief executive officer of American Financial Group since January 2005. <P1-S2>  He has also acted as chief executive officer and majority owner of FC Cincinnati since the club's founding in 2015. <P1-S3>  He is the son of Carl Lindner Jr. and a prominent member of the Lindner family. <SEP> <P2-S0> Terry Semel (born February 24, 1943) is an American corporate executive who was the chairman and CEO of Yahoo! Incorporated from 2001 to 2007. <P2-S1>  Previously, he spent 24 years at Warner Bros., where he served as chairman and co-chief executive officer. <P2-S2>  He resigned as CEO due in part to pressure from shareholders' dissatisfaction over his compensation (in 2006, salary $1, stock options worth $70 million) and performance. <P2-S3>  He is also the founder of Windsor Media which has produced "Rules Don't Apply" starring Lily Collins and Warren Beatty. <SEP> <P3-S0> The Lindner family is a family that has been prominent in the Cincinnati metropolitan area since the mid-20th century. <P3-S1>  They are known for their work in the insurance and investments business. <P3-S2>  As of 2015, "Forbes" ranks them as the 129th richest family in the United States. <P3-S3>  They are also known for their involvement in professional sports; Carl Jr. was a part owner and CEO of the Cincinnati Reds, Carl III is the majority owner and CEO of FC Cincinnati, and the family's contributions to the Western & Southern Open led to its venue being titled the Lindner Family Tennis Center.