A couple in a parking lot.
A couple is walking together.
One can assume if a couple were in a parking lot together that they would also be walking together.
exists x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_lot(x2) & of(x2,x3) & n_parking(x3) & n_couple(x1))
exists e1 s1 x1.(a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_couple(x1))