A pitcher stands on the mound.
A baseball player is on the field.
A pitcher is a baseball player.
exists e1 x1 x2.(n_mound(x2) & on(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_pitcher(x1))
exists p1 x1 x2 x3.(n_field(x3) & on(x1,x3) & n_player(x1) & of(x1,x2) & n_baseball(x2))