The scuba diver is underwater.
The water is clear.
the water could be not clear
exists p1 x1 x2.(n_diver(x1) & of(x1,x2) & n_scuba(x2) & exists x3.((x1 = x3) & n_underwater(x3)))
exists s1 x1.(n_water(x1) & Theme(s1,x1) & a_clear(s1))