O`Brien leaves duo in Grand Prix Aidan O`Brien is responsible for two of the five horses left in at today`s probables stage for the Group One Grand Prix de Paris at Longchamp on Sunday.The Irish trainer has kept Bonnard and Hans Anderson in the 10-furlong event but withdrawn Milan, who runs instead at Royal Ascot tomorrow.Chichicastenango and Okawango, second and fourth in the French Derby, and Mizzen Mast complete the quintet.