A baseball pitcher prepares to throw.
The player is a pitcher in baseball
Just because pitcher is preparing to throw doesn't mean he is a player.
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2.(Actor(e2,x1) & v_throw(e2)) & n_pitcher(x1) & of(x1,x2) & n_baseball(x2))
exists p1 x1.(n_player(x1) & exists x2 x3.((x1 = x2) & in(x2,x3) & n_baseball(x3) & n_pitcher(x2)))