A man with no shirt is leaning on a half-door.
A man wearing a t-shirt walks through the doorway.
A man cannot have no shirt and be wearing a shirt at the same time
exists x1.(-exists e1 x2 x3.(on(e1,x3) & n_half-door(x3) & Actor(e1,x1) & v_lean(e1) & with(x1,x2) & n_shirt(x2)) & n_man(x1))
exists e1 e2 x1 x2 x3 x4.(n_doorway(x4) & through(e2,x4) & Actor(e2,x1) & v_walk(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_t-shirt(x3) & (x1 = x2) & n_man(x1))