A black man stands on a moving boat in the harbor.
A man stands on a boat.
A man can be a black man. Boats are usually moving when a person stands on them.
exists e2 e1 s1 x1 x2 x3.(n_harbor(x3) & on(e1,x2) & in(x2,x3) & n_boat(x2) & Actor(e2,x2) & v_move(e2) & Actor(e1,x1) & v_stand(e1) & n_man(x1) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2.(on(e1,x2) & n_boat(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))