A mother and son walk along a dirt path.
There are two people walking outdoors.
Mother and son are two people.
exists s1 x1 x2 x3 x4 x5.(a_topic(s1) & along(s1,x4) & n_path(x4) & of(x4,x5) & n_dirt(x5) & Time(s1,x3) & n_walk(x3) & subset_of(x2,s1) & n_son(x2) & subset_of(x1,s1) & n_mother(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_walk(e1) & n_outdoors(x4) & (x2 = x3) & n_people(x2) & card_eq_2(x2))