A couple and child are watching people walk by.
The family is on the way to a movie.
A couple and child does not mean they are family. Watching people walk by is mostly done in a stationary position not on the way to a movie
exists e2 e1 s1 x1 x2 x3 x4 x5.(Theme(e2,x4) & Actor(e2,x1) & v_watch(e2) & a_by(s1) & Manner(e1,s1) & Theme(e1,x5) & v_walk(e1) & (x4 = x5) & n_people(x4) & n_child(x3) & n_couple(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists p1 x1 x2.(n_way(x2) & n_family(x1) & exists x3.(on(x1,x2) & to(x2,x3) & n_movie(x3)))