A dog running in a field.
A kangaroo is jumping in the outback.
A kangaroo is not a dog.  One cannot be jumping and running at the same time.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_field(x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1))
exists e1 x1 x2.(n_outback(x2) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_kangaroo(x1))