A line of customers at a deli.
A group of people dancing.
line of customers cannot be a group of people dancing
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & at(x2,x3) & n_deli(x3) & n_customer(x2) & n_line(x1))
exists e1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & Actor(e1,x3) & v_dance(e1) & (x2 = x3) & n_people(x2) & n_group(x1))