Two bikers ride through a camping area.
They are on a stroll
bikers  cannot be on a stroll while riding through a camping area
exists e1 x1 x2 x3.(through(e1,x2) & n_area(x2) & of(x2,x3) & n_camping(x3) & Actor(e1,x1) & v_ride(e1) & n_biker(x1) & card_eq_2(x1))
exists p1 x1.(n_thing(x1) & exists x2.(on(x1,x2) & n_stroll(x2)))