A father and son stroll pass a lingerie shop.
the child is black
A son can be of any ethnicity and doesn't have to be black.
exists e1 x1 x2 x3 x4 x5 x6.(Theme(e1,x5) & Actor(e1,x1) & v_pass(e1) & n_shop(x5) & of(x5,x6) & n_lingerie(x6) & n_son(x3) & of(x3,x4) & n_stroll(x4) & n_father(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists s1 x1.(n_child(x1) & Theme(s1,x1) & a_black(s1))