man with no shirt on in a field.
A male model poses shirtless in a corn field.
The first sentence says nothing about the man being a model or that he is posing. It also does not say that the model is in a corn field.
exists x1.(-exists s1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & in(s1,x4) & n_field(x4) & Theme(s1,x3) & a_on(s1) & (x2 = x3) & n_shirt(x2)) & n_man(x1))
exists e1 p1 s1 x1 x2 x3.(in(e1,x2) & n_field(x2) & of(x2,x3) & n_corn(x3) & exists s2.(Theme(s2,x1) & a_shirtless(s2)) & Topic(e1,p1) & Actor(e1,x1) & v_pose(e1) & n_model(x1) & a_male(s1) & Theme(s1,x1))