A line of customers at a deli.
A line of customers inside.
If they are in a deli they are inside.
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & at(x2,x3) & n_deli(x3) & n_customer(x2) & n_line(x1))
exists x1 x2.(a_topic(x1) & of(x1,x2) & r_inside(x2) & n_customer(x2) & n_line(x1))