A man with a trash bucket walks by a statue.
A man is painting a picture.
One who is painting a picture cant be with a bucket simultaneously.
exists e1 x1 x2 x3 x4.(by(e1,x4) & n_statue(x4) & Actor(e1,x1) & v_walk(e1) & with(x1,x2) & n_bucket(x2) & of(x2,x3) & n_trash(x3) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & n_picture(x2) & n_man(x1))