The scuba diver is underwater.
The diver is surrounded by water.
The scuba diver is a diver and his surrounded by water is equivalent to scuba driver underwater.
exists p1 x1 x2.(n_diver(x1) & of(x1,x2) & n_scuba(x2) & exists x3.((x1 = x3) & n_underwater(x3)))
exists e1 x1 x2.(n_diver(x1) & Actor(e1,x2) & n_water(x2) & Theme(e1,x1) & v_surround(e1))