Question: Jay Kahn is a Democratic member of the New Hampshire Senate, what is a county that is located in the 10th district?
Context: Deborah Reynolds was a Democratic member of the New Hampshire Senate, representing the 2nd District from 2006 to 2010.  She was Chairman of the New Hampshire Senate Judiciary Committee and served on the Commerce, Labor and Consumer Protection Committee, Rules and Enrolled Bills Committee, and the Ways and Means Committee.  She is one of five governor-appointed commissioners on the New Hampshire Commission for Human Rights. David Gottesman was a Democratic member of the New Hampshire Senate, representing the 12th District from 2004 to 2008.  He was also the Democratic Whip in the New Hampshire Senate in 2008.  One of Sen. Gottesman's most notable accomplishments came in 2007 with the passing of New Hampshire's SB-42-FN.  Sen. Gottesman along with nine other state senators and four state representatives sponsored the bill, which prohibits smoking in public bars and restaurants and some other enclosed areas. Lou D'Allesandro (born July 30, 1938) is a Democratic member of the New Hampshire Senate, representing the 20th District since 1998.  Previously he was a member of the New Hampshire Executive Council from 1975-1981 and the New Hampshire House of Representatives from 1996 through 1998.  Senator D'Allesandro appears frequently on the Paul Westcott Show on WGIR (AM) and WQSO. Gilsum is a town in Cheshire County, New Hampshire, United States.  The population was 813 at the 2010 census.  Home to the Bear's Den Natural Area, Gilsum includes Gilsum Lower Village. Martha Fuller Clark (born March 14, 1942 in York, Maine) is a Democratic member of the New Hampshire Senate, representing the 21st District since 2012, and having represented the 24th District from 2004-10.  Prior to her Senate service she was a member of the New Hampshire House of Representatives from 1990 through 2002. Betsi DeVries was a Democratic member of the New Hampshire Senate, representing the 18th District since 2006.  Previously she was a member of the New Hampshire House of Representatives from 2004 through 2006.  She lost her re-election bid in November 2010. Molly Kelly was a Democratic member of the New Hampshire Senate, representing the 10th District from 2006 until 2016. Sylvia Larsen is a New Hampshire politician who was a Democratic member of the New Hampshire Senate and its longest serving Democratic female leader.  She represented New Hampshire's 15th State Senate District for 20 years, from 1994 through 2014.  From 2006 through 2010, during the period when Democrats had regained control of the chamber, Larsen served as Senate President.  Between 2008-2010, Larsen made history as she led the nation's first female majority legislative body with 13 women and 11 men.  Legislative accomplishments include sponsoring the nation' s first tax-free college savings 529 plan, the Unique Plan, and NH's first paycheck fairness plan safeguarding equal pay for equal work. Jay Kahn is a Democratic member of the New Hampshire Senate representing the 10th district.  The 10 district is located in the southwestern corner of the state and includes Alstead, Chesterfield, Gilsum, Harrisville, Hinsdale, Keene, Marlborough, Roxbury, Sullivan, Surry, Swanzey, Walpole, Westmoreland and Winchester, New Hampshire. Joseph A. Foster (born June 10, 1959) is the former Attorney General of the State of New Hampshire.  He was formerly a Democratic member of the New Hampshire Senate, representing the 13th District from 2002 until 2008 and served as the State Senate Majority Leader in 2007 and 2008.  Previously he was a member of the New Hampshire House of Representatives from 1994 through 1998.  On April 17, 2013 he was confirmed to the office of Attorney General.  He took office on May 15, 2013, succeeding Michael A. Delaney who decided not to seek reappointment by Governor Maggie Hassan at the end of his term, and instead took Foster's old position at his law firm.  Foster is considered a potential future Congressional candidate.
Answer: Cheshire County