A soccer player with no shirt standing in the middle of the field.
The shirtless soccer player stands in the center of the field.
No shirt implies shirtless.
exists x1 x2 x5 x6.(n_field(x6) & n_middle(x5) & -exists e1 x3 x4.(a_topic(x1) & with(x1,x3) & in(e1,x5) & of(x5,x6) & Actor(e1,x4) & v_stand(e1) & (x3 = x4) & n_shirt(x3)) & n_player(x1) & of(x1,x2) & n_soccer(x2))
exists e1 s1 x1 x2 x3 x4.(n_field(x4) & n_center(x3) & n_player(x1) & of(x1,x2) & n_soccer(x2) & a_shirtless(s1) & Theme(s1,x1) & in(e1,x3) & of(x3,x4) & Actor(e1,x1) & v_stand(e1))