A young boy walking behind a woman.
A boy and a woman walk together.
Walking behind a woman implies that the boy and the woman walk together
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 e1 p1 s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & exists s2.(Theme(s2,x3) & a_together(s2)) & Recipient(e1,p1) & Topic(e1,x3) & v_walk(e1) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_boy(x1))