<prompt> Translate the following text to EnglishKama kitabu cha Alan Ehrenholt, Jiji Lililopotea, kitabu hiki kinaonyesha jinsi watu walivyoishi katika miaka ya 1950 na miaka ya 1990.  <response>: A new book by Alan Ehrenhalt, The Lost City , is subtitled Discovering the Forgotten Virtues of Community in the Chicago of the 1950s . 