An overweight couple walking.
Two people are walking.
Two people could be an overweight couple.
exists s1 x1 x2.(a_topic(x1) & n_walking(x1) & of(x1,x2) & n_couple(x2) & a_overweight(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_people(x1) & card_eq_2(x1))