Premise: 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.
Hypothesis: 15 women served as aldermen in Chicago before Troutman.