A young boy walking behind a woman.
A mother and son walk to the store together.
A young boy walking behind a woman doesn't necessarily mean they are mother and son
exists e1 s1 x1 x2 x3.(a_topic(x1) & behind(e1,x3) & n_woman(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists x1 x2 x3 x4.(n_store(x4) & a_topic(x1) & r_together(x1) & n_walk(x1) & to(x1,x4) & subset_of(x3,x1) & n_son(x3) & subset_of(x2,x1) & n_mother(x2))