The park bench is mounted into the ground.
The green bench is mounted into the ground
Just because there is a bench doesn't mean it is green.
exists e1 x1 x2 x3.(n_ground(x3) & n_bench(x1) & of(x1,x2) & n_park(x2) & into(e1,x3) & Theme(e1,x1) & v_mount(e1))
exists e1 s1 x1 x2.(n_ground(x2) & n_bench(x1) & a_green(s1) & Theme(s1,x1) & into(e1,x2) & Theme(e1,x1) & v_mount(e1))