The water is very clear.
Their is a lot of algae floating in the water.
The water cannot be both filled with algae and clear.
exists s1 x1.(n_water(x1) & r_very(s1) & Theme(s1,x1) & a_clear(s1))
exists p1 x1 x5.(n_water(x5) & exists e1 x2 x3 x4.((x1 = x2) & in(e1,x5) & Actor(e1,x4) & v_float(e1) & (x2 = x4) & of(x2,x3) & n_alga(x3) & n_lot(x2)) & n_their(x1))