A man takes a picture of colorful art painted on a wall.
No one can see the art on the wall.
A man can't be taking a picture of art that no one can see.
exists e1 e2 s1 x1 x2 x3 x4 x5.(Theme(e2,x2) & Actor(e2,x1) & v_take(e2) & of(x2,x3) & on(e1,x5) & n_wall(x5) & Theme(e1,x4) & v_paint(e1) & (x3 = x4) & n_art(x3) & a_colorful(s1) & Theme(s1,x3) & n_picture(x2) & n_man(x1))
exists x2 x3.(n_wall(x3) & n_art(x2) & -exists e1 p1 x1.(exists e2.(on(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_see(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1) & n_one(x1)))