Question: What side of town is the Chicago Mayer-endorsed, 38th Ward of the City of Chicago alderman serving?
Context: Bernie Hansen (born November 26, 1944) is a former longtime Chicago alderman, serving on the Chicago City Council from 1983 to 2002, when he retired as alderman of the 44th Ward citing health reasons.  He is a Democrat. Nicholas Sposato serves on Chicago City Council as alderman of the 38th Ward of the City of Chicago on the city's Northwest Side.  Sposato was elected in 2011 in an election against incumbent alderman John Rice, who was endorsed by then Mayor-elect Rahm Emanuel. Susan Sadlowski Garza is a member of the Chicago City Council serving as Alderman for the 10th ward.  The 10th ward is located on Chicago's southeast side and includes East Side, Hegewisch, Jeffrey Manor, South Chicago and South Deering.  She is serving her first term after defeating Rahm Emanuel ally John Pope in the 2015 election. Toni Foulkes is the current alderman of Chicago's 16th ward, and was formerly the alderman for the 15th ward.  She is African American.  In 2014, as 15th ward alderman, she supported a bill to require employers to provide paid for sick leave for all Chicago workers. Shirley Ann Coleman (née Turner; born December 4, 1955) is an American politician and pastor.  Coleman is a former alderman of the 16th ward in Chicago, Illinois.  Coleman was first elected in January 1991, serving for sixteen years until May 2007 when she lost a run-off election to JoAnn Thompson after coming in second in the 2007 general election.  As of 2017, Coleman is the only alderman to date elected in the 16th Ward for four consecutive terms.  Coleman made history as the only African American Chicago female alderman who is an ordained minister and pastor. Bernard "Berny" L. Stone (November 24, 1927 – December 22, 2014) was alderman of the 50th Ward of the City of Chicago, Illinois from 1973 to 2011.  The 50th Ward encompasses part of Chicago's far North Side and includes the West Ridge, West Rogers Park and Peterson Park neighborhoods.  First elected to the Council in 1973, Stone was the second longest-serving alderman (after Edward M. Burke).  His tenure spanned the terms of seven Mayors, from Richard J. Daley to Richard M. Daley.  Stone was also Vice Mayor of the City of Chicago from 1998 to 2011. Raymond Anthony Lopez (born May 26, 1978) is an American politician who serves at the alderman and Democratic Committeeman of the 15th Ward in Chicago, Illinois.  A member of the Democratic Party, Lopez was first elected as Democratic Committeeman of the 15th Ward in 2012, becoming the first openly gay Mexican-American to be elected in Illinois.  On April 7, 2015, Lopez was elected alderman of the 15th Ward. Wilson Frost (born December 27, 1925) is a former Chicago alderman of the 34th Ward.  In 1976, upon the death of longtime mayor Richard J. Daley, Frost declared that he was now acting mayor, based upon his interpretation of the city charter and the fact that he was serving as President Pro Tempore of the City Council.  However, Wilson found himself literally locked out of the mayor's office—he was told that the keys could not be found.  In a power struggle that lasted several days, the entirely Democratic city council determined that Frost was incorrect in his claim, and appointed Alderman Michael Bilandic as acting mayor instead.  Had he been elected mayor, Wilson Frost would have been Chicago's first African American mayor. Arenda Troutman (born 1957) was the Democratic alderman of the 20th Ward in Chicago.  She was appointed to her position by Mayor Richard M. Daley in 1990, to fill a vacancy after the death of Alderman Ernest Jones.  Troutman was the 16th woman to serve as a Chicago alderman.  Despite her arrest and indictment on bribery charges, Troutman ran for alderman in 2007; she lost. Rahm Israel Emanuel ( ; born November 29, 1959) is an American politician who is the 44th and current mayor of Chicago.  A member of the Democratic Party, Emanuel was elected in 2011.  He was re-elected on April 7, 2015.
Answer: Northwest Side