A photographer captures the beauty of a river.
the river is green
A river can be of any color other than green.
exists e1 x1 x2 x3.(n_beauty(x2) & Theme(e1,x2) & Actor(e1,x1) & v_capture(e1) & of(x2,x3) & n_river(x3) & n_photographer(x1))
exists s1 x1.(n_river(x1) & Theme(s1,x1) & a_green(s1))