A person in a jacket and wearing jeans kneels down to take a picture of a graffiti-laden wall.
A person is taking a picture of a barrier.
A wall can be said to be a  barrier.
exists e1 p1 s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x3,s1) & Topic(x3,p1) & exists e2 s2 x5 x6.(Theme(e2,x5) & Actor(e2,x3) & v_take(e2) & of(x5,x6) & n_wall(x6) & a_graffiti-laden(s2) & Theme(s2,x6) & n_picture(x5)) & r_down(x3) & n_kneel(x3) & of(x3,x4) & n_jeans(x4) & Actor(e1,x3) & v_wear(e1) & subset_of(x1,s1) & in(x1,x2) & n_jacket(x2) & n_person(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & of(x2,x3) & n_barrier(x3) & n_picture(x2) & n_person(x1))