A sports team poses on the field.
There are no people on the field.
If a sports team is posing on the field, there cannot be no people on the field.
exists e1 x1 x2 x3.(n_field(x3) & on(e1,x3) & Actor(e1,x1) & v_pose(e1) & n_team(x1) & of(x1,x2) & n_sport(x2))
exists p1 x1 x3.(n_field(x3) & -exists x2.((x1 = x2) & on(x2,x3) & n_people(x2)))