three bikers stop in town.
The bikers are riding Harley's.
Not all bikers ride Harley's.
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 e1 x1 x2 x3.(n_biker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_'s(x2) & (x2 = x3) & ne_per_harley(x3))