A sailor steers a sailboat through a turn.
A sailor is steering a sailboat.
If a sailor steers something they are said to be steering.
exists e1 x1 x2 x3.(through(e1,x3) & n_turn(x3) & Theme(e1,x2) & Actor(e1,x1) & v_steer(e1) & n_sailboat(x2) & n_sailor(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_steer(e1) & n_sailboat(x2) & n_sailor(x1))