three bikers stop in town.
The bikers didn't stop in the town.
There can be less than, more than or equal to three bikers.  Bikers either stop or don't stop in town.
exists e1 x1 x2 x3.(in(e1,x3) & n_town(x3) & Theme(e1,x2) & Actor(e1,x1) & v_stop(e1) & n_thing(x2) & n_biker(x1) & card_eq_3(x1))
exists x1 x2.(n_town(x2) & n_biker(x1) & -exists e1.(in(e1,x2) & Actor(e1,x1) & v_stop(e1)))