A person wearing glasses is prepped for some kind of dental work.
dentist is having lunch
A person that prepped for some kind of dental work cannot be the dentist having lunch.
exists e2 e1 s1 x1 x2 x3 x4 x5.(for(e2,x4) & of(x4,x5) & n_work(x5) & a_dental(s1) & Theme(s1,x5) & n_kind(x4) & Theme(e2,x1) & v_prep(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_glass(x3) & (x1 = x2) & n_person(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_lunch(x2) & n_dentist(x1))