Family purchasing standing at a vending machine.
The family is standing by the counter.
If they are standing at a vending machine then they are not standing by the counter.
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(x1,x4) & n_machine(x4) & Actor(e1,x4) & v_vend(e1) & n_standing(x1) & of(x1,x3) & n_purchasing(x3) & (x1 = x2) & ne_nam_family(x2))
exists e1 x1 x2.(n_counter(x2) & n_family(x1) & by(e1,x2) & Actor(e1,x1) & v_stand(e1))