A shirtless man is rock climbing on a vertical rock face.
The man is wearing a shirt.
A shirtless man cannot be wearing a shirt.
exists p1 s1 x1.(exists e1 s2 x2 x3 x4 x5.((x1 = x2) & on(e1,x4) & n_face(x4) & of(x4,x5) & n_rock(x5) & a_vertical(s2) & Theme(s2,x4) & Actor(e1,x3) & v_climb(e1) & (x2 = x3) & n_rock(x2)) & n_man(x1) & a_shirtless(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_shirt(x2))