People watching TV while eating.
Nobody is watching TV
People, and nobody, cannot simultaneously be watching TV.
exists e1 e2 x1 x2 x3.(a_topic(x1) & while(e1,e2) & Actor(e2,x2) & v_eat(e2) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_tv(x3) & (x1 = x2) & n_people(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_tv(x2) & n_person(x1))