The group began the U.S. tour , which is scheduled to last until September 18 , with a concert in Chicago on Tuesday at which Noel Gallagher filled in for his brother as lead singer .
<response> The group began the <location>U.S.</location> tour , which is scheduled to last until September 18 , with a concert in <location>Chicago</location> on Tuesday at which <person>Noel Gallagher</person> filled in for his brother as lead singer . </response>