There is an old style motorcycle by the field.
A bike is for sale by the farm.
You can not infer it's at the farm.
exists p1 x1 x4.(n_field(x4) & exists s1 x2 x3.((x1 = x2) & by(x2,x4) & Time(x2,x3) & n_motorcycle(x3) & n_style(x2) & a_old(s1) & Theme(s1,x2)))
exists p1 x1 x3.(n_farm(x3) & exists x2.(for(x1,x2) & by(x2,x3) & n_sale(x2)) & n_bike(x1))