Yang Se-hyung (born on August 18, 1985), is a South Korean comedian, and entertainer.
 His most known for his work on the tvN sketch comedy show "Comedy Big League" and MBC's "Infinite Challenge".
 His younger brother, Yang Se-chan, is also a comedian.
debitel AG is one of the largest mobile telephone services providers in Europe, offering a wide range of telecommunication products – mobile and land-line telephony as well internet services.
 At its peak, the business commanded a 47% market share of the mobile service provider market in Germany (its largest market) with 12.4% of the overall mobile telephone market as of 2004 .
 The company boasted over 10.2 million customers of which 8.3 million were resident in Germany.
Nord Pool runs the largest market for electrical energy in Europe, measured in volume traded (TWh) and in market share.
 It operates in Norway, Denmark, Sweden, Finland, Estonia, Latvia, Lithuania, Germany and the UK.
 More than 80% of the total consumption of electrical energy in the Nordic market is traded through Nord Pool.
 It was the world's first multinational exchange for trading electric power.
The Mortgage industry of the United Kingdom has traditionally been dominated by building societies, but from the 1970s the share of the new mortgage loans market held by building societies has declined substantially.
 Between 1977 and 1987, the share fell drastically from 96% to 66% while that of banks and other institutions rose from 3% to 36%.
 The major lenders include building societies, banks, specialized mortgage corporations, insurance companies, and pension funds.
 During the four years following the Financial crisis of 2008 the UK mutual sector provided approximately 80% of net lending to the housing market.
 There are currently over 200 significant separate financial organizations supplying mortgage loans to house buyers in Britain of which the Lloyds Bank and the Nationwide Building Society have the largest market share.
The adoption of plug-in electric vehicles in the United States is actively supported by the American federal government, and several state and local governments. s of 2016 , cumulative sales in the U.S. totaled 570,187 highway legal plug-in electric vehicles since the market launch of the Tesla Roadster in 2008, representing 28.1% of the global light-duty plug-in stock.
 s of 2016 , the U.S. has the world's third largest stock of plug-in passenger cars after China and Europe.
 The U.S. market share of plug-in electric passenger cars increased from 0.14% in 2011 to 0.62% in 2013.
 The plug-in segment reached a market share of 0.75% in 2014 and fell to 0.66% in 2015.
 The plug-in segment achieved a record market share of 0.90% in 2016.
 California is the largest plug-in car regional market in the country, with almost 270,000 plug-in electric vehicles registered through December 2016, and accounts for approximately 48% of cumulative plug-in sales in the American market from 2011 to June 2016.
 The other nine states that follow California's Zero Emission Vehicle (ZEV) regulations account for another 10% of cumulative plug-in car sales in the U.S. during the same period.
Nordic electricity market is a common market for electricity in the Nordic countries.
 It is one of the first free electric-energy markets in Europe and is traded in NASDAQ OMX Commodities Europe and Nord Pool Spot.
 In 2003, the largest market shares were as follows: Vattenfall 17%, Fortum 14.1%, Statkraft 8.9%, E.on 7.5%, Elsam 5%, Pohjolan Voima 5%.
 Other producers had 42.5% market share.
Infinite Challenge (; abbreviated as 무도 "Mudo") is a South Korean television entertainment program, distributed and syndicated by MBC.
 As of January 2013, it had the largest market share for its timeslot; with between 13 and 17 percent of Korean television viewers watching "Infinite Challenge" every Saturday night.
 making it the most-watched free-to-air television program on Saturday evenings, and the most viewed non-drama program in South Korea every week (excluding special sporting events, since November 2006, with the exception of January 2009, April and May 2010).
 It has kept the same scheduled time, since first airing in 2005.
 Since 2009, it lasts for roughly 75 minutes, excluding ten minutes of advertising.
 Episodes are also frequently rerun on several Korean cable broadcasting channels.
 Since February 19, 2011 (episode 237), the program has been aired in high-definition.
 "Infinite Challenge" has been called "the nation's variety show" and "Korea's real first variety" for having been successful for over ten years.
Strong Heart () is a South Korean talk show or talk battle broadcast by SBS.
 It aired on Tuesdays from 11:50 to Wednesdays 00:30.
 It was hosted by Lee Dong-wook and Shin Dong-yup with Boom, Super Junior's Leeteuk and Eunhyuk as hosts of a special segment and regular guests along with Kim Hyo-jin, Jung Ju-ri and Yang Se-hyung, who are known as six-fixed guests.
 The program relaunched as a second season with Shin Dong-yup and new hosts, actress, Kim Hee-sun, and singer, Yoon Jong-shin, in February 2013.
Banco de Crédito del Perú is the largest bank and the leading supplier of integrated financial services in Perú with approximately US$ 39 billion in total assets and a market share of 30.4% in total loans and 33.5% in total deposits.
 BCP has more than 127 years of presence in the country and represents Peru’s most valuable brand.
 Its network of more than 8,340 points of contact serves its more than 6 million clients.
 BCP is the main subsidiary of Credicorp (NYSE: BAP), the largest financial holding in Peru.
 BCP’s Wholesale Banking competes with local and foreign banks and provides its customers with short and medium-term loans in local and foreign currencies, foreign trade-related financing, lease financing, underwriting and financial advisory.
 Its currently the market leader with a market share of more than 40% in corporate loans.
 BCP’s Retail Banking serves individuals and small-sized companies with a wide range of high value-proposition products with a market share of over 20%.
 In addition, BCP is the largest capital market and brokerage distribution system in Peru; its main activities include asset management, foreign exchange transactions, treasury, custody and trust, investment advisory services, and research activities.
Tanqueray is a brand of gin produced by Diageo plc and marketed worldwide.
 Although it originated in England, it is now produced in Scotland.
 It does not command a sizable market share in its native market, but its largest market is in the United States, where it is the highest selling gin import, followed by southern Europe.

Question: Yang Se-hyung is known for his work on a program which had the largest market share for its timeslot as of what date?
Answer: January 2013