A SCUBA diver swimming deep underwater with a turtle.
A swimmer is following a turtle around in the ocean.
A diver does not have to be following a turtle,
exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & with(x1,x5) & n_turtle(x5) & n_underwater(x1) & a_deep(s1) & Theme(s1,x1) & of(x1,x4) & n_swimming(x4) & of(x1,x3) & n_diver(x3) & (x1 = x2) & ne_nam_scuba(x2))
exists e1 x1 x2 x3.(n_ocean(x3) & r_around(e1) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_follow(e1) & n_turtle(x2) & n_swimmer(x1))