Question: The city Bats Global Markets is based in is in what Kansas county?

Context paragraphs:
Eric Swanson: Eric J. Swanson is an American lawyer and the Senior Vice President, General Counsel, and Secretary of BATS Global Markets, the third-largest stock exchange in the United States.

Dave Cummings (entrepreneur): Dave Cummings is an American entrepreneur and CEO of the high-frequency trading firm Tradebot, founded in 1999.  He also is the founder of the BATS Global Markets stock exchange.  He graduated from Purdue University and previously worked for Cerner before founding his own companies.

CBOE Holdings: CBOE Holdings is an American company that owns the Chicago Board Options Exchange and the stock exchange operator BATS Global Markets.

BATS Chi-X Europe: BATS Chi-X Europe is a London-based, order-driven pan-European equity exchange that has been a subsidiary of BATS Global Markets since 2011.  It is a low latency, low cost alternative to exchange traded equities and exchange-traded funds (ETFs) that are listed on primary exchanges such as the London Stock Exchange, Frankfurt Stock Exchange, Euronext and OMX.

Lenexa, Kansas: Lenexa is a city in Johnson County, Kansas, United States, and part of the Kansas City Metropolitan Area.  As of the 2010 census, the city population was 48,190.  It is bordered by the cities of Shawnee to the north, Overland Park to the east, De Soto to the west and Olathe to the south.

Haim Bodek: Haim Bodek is an American developer of trading software, and the son of physicist Arie Bodek.  He worked for Hull Trading Company which was acquired by Goldman Sachs in 1999.  He became the global head of Electronic Volatility Trading at UBS by 2003, and later established his own company Trading Machines.  When his software inexplicably started losing money in 2009, he eventually tracked down the cause to an undocumented order type which was being used by other algorithmic trading companies to gain an advantage over other traders.  He exposed the situation with a complaint in 2011 to the Securities and Exchange Commission, which resulted in BATS Global Markets paying a record $14 million fine.  He also provided information for a 2012 article in the The Wall Street Journal written by Scott Patterson and Jenny Strasburg.

Paul S. Atkins: Paul S. Atkins is CEO of Patomak Global Partners LLC, which provides consulting services regarding financial services industry matters, including regulatory compliance, risk and crisis management, public affairs, independent reviews, litigation support, and strategy.  He also serves as an independent director and non-executive chairman of the board of BATS Global Markets, Inc., a leading operator of electronic U.S. and European securities markets trading listed cash equity securities and equity options.

BATS Global Markets: Bats Global Markets is a global stock exchange operator based in Lenexa, Kansas, with additional offices in London, New York, Chicago and Singapore.  Bats was founded in June 2005, became operator of a licensed U.S. stock exchange in 2008 and opened its pan-European stock market in October 2008.  As of February 2016, it operates four U.S. stock exchanges, two U.S. equity options exchanges, the pan-European stock market and a global market for the trading of foreign exchange products.  BATS is owned by CBOE Holdings.

Bill Tilghman: William Matthew "Bill" Tilghman Jr. (July 4, 1854 – November 1, 1924) was a career lawman and gunfighter during the Wild West days of Kansas and Oklahoma.  He was city marshal in Dodge City, participated in the Kansas County Seat Wars, and moved on to Oklahoma where he participated in the land rushes, including the Cherokee Strip Land Rush.  He served as a Deputy U.S. Marshal in Oklahoma and was celebrated for capturing the outlaw Bill Doolin.  Tilghman never achieved the household-word status of his close friends Wyatt Earp and Bat Masterson but released his memoirs in a film that he directed and starred in as himself.  He died at the age of seventy, after being shot down on the streets of Cromwell, Oklahoma.  The fame that Bill Tilghman did achieve was largely due to the efforts of his second wife, who wrote his biography in 1949.

Jason Press: Jason Press (born November 19, 1971) is an American investment strategist and political scientist specializing in financial markets and global political risk.  He is the head of the global markets division of Eurasia Group, a political risk research and consulting firm founded by Ian Bremmer in 1998 with offices in New York City, Washington, London, Tokyo, São Paulo, San Francisco, and Singapore.  Eurasia Group provides analysis and expertise about how political developments and geopolitics move markets and shape investment environments across the globe. I

Supporting paragraphs: BATS Global Markets Lenexa, Kansas
Answer: Johnson County