three bikers bike across the dry land.
Men are riding in a van
Bike and van are different.
exists s1 x1 x2 x3.(n_land(x3) & a_dry(s1) & Theme(s1,x3) & a_topic(x1) & across(x1,x3) & n_bike(x1) & of(x1,x2) & n_biker(x2) & card_eq_3(x1))
exists e1 x1 x2.(in(e1,x2) & n_van(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1))