The water is very clear.
The water is filled with raw sewage.
The water cannot be both filled with sewage and clear.
exists s1 x1.(n_water(x1) & r_very(s1) & Theme(s1,x1) & a_clear(s1))
exists e1 s1 x1 x2.(n_water(x1) & with(e1,x2) & n_sewage(x2) & a_raw(s1) & Theme(s1,x2) & Theme(e1,x1) & v_fill(e1))