A young boy crosses the road on a crosswalk in the city.
The boy is holding hands with his mother.
There is no one else mentioned besides the boy, nor an activity which must involve more than one person such as holding hands with someone, in this case his mother.
exists e1 s1 x1 x2 x3 x4.(n_city(x4) & n_road(x2) & Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & on(x2,x3) & in(x3,x4) & n_crosswalk(x3) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_mother(x3) & of(x3,x1) & n_male(x1) & n_boy(x1) & with(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_hand(x2))