A man and a woman are spray painting a wall.
A man and woman spray painting on the wall.
spray painting a wall is inferred as  spray painting on the wall.
exists p1 x1 x2 x3.(all x4.(n_wall(x4) -> exists s1 x5.((x1 = x5) & for(x5,x4) & n_painting(x5) & a_spray(s1) & Theme(s1,x5))) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists s1 x1 x2 x3 x4 x5.(n_wall(x5) & a_topic(s1) & subset_of(x2,s1) & on(x2,x5) & n_painting(x2) & of(x2,x4) & n_spray(x4) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))