which city located on football at the 2014 summer youth olympics is also the stadium 2011–12 olympiacos f . c . season ?
SELECT DISTINCT var_uri where brack_open dbr_2011–12_Olympiacos_F.C._season dbp_stadium var_uri sep_dot dbr_Football_at_the_2014_Summer_Youth_Olympics dbp_cities var_uri brack_close