A security guard stands by a metal, lighted sculpture.
The guard has a gun.
You can't imply the guard has a gun if he's just a security guard.
exists e1 e2 x1 x2 x3 x4.(by(e1,x3) & rel(x3,x4) & n_sculpture(x4) & Theme(e2,x4) & v_light(e2) & n_metal(x3) & Actor(e1,x1) & v_stand(e1) & n_guard(x1) & of(x1,x2) & n_security(x2))
exists e1 x1 x2.(n_guard(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_gun(x2))