who was the chairman of fc girondins de bordeaux and also 2015–16 fc girondins de bordeaux season ?
SELECT DISTINCT var_uri where brack_open dbr_2015–16_FC_Girondins_de_Bordeaux_season dbo_chairman var_uri sep_dot dbr_FC_Girondins_de_Bordeaux dbo_chairman var_uri brack_close