Two motorcyclists are standing on the side of the road and one is wearing a skull mask.
Two bikers, one of which is wearing a skull mask, stand on the side of the street.
One of the two bikers wearing a skull mask.
exists e1 e2 x1 x2 x3 x4 x5 x6.(n_road(x3) & n_side(x2) & Theme(e2,x5) & Actor(e2,x4) & v_wear(e2) & n_mask(x5) & of(x5,x6) & n_skull(x6) & n_one(x4) & on(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_stand(e1) & n_motorcyclist(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_street(x9) & n_side(x8) & Theme(e1,x5) & Actor(e1,x3) & v_wear(e1) & rel(x5,x7) & on(x7,x8) & of(x8,x9) & n_stand(x7) & n_mask(x5) & of(x5,x6) & n_skull(x6) & of(x3,x2) & rel(x3,x4) & n_thing(x4) & card_eq_1(x4) & n_biker(x3) & card_eq_2(x3) & n_thing(x1) & (x1 = x2))