Tourists mingle on a street.
People are talking in the auditorium.
If tourists are mingling on a street, they wouldn't be talking in the auditorium.
exists e1 x1 x2.(on(e1,x2) & n_street(x2) & Actor(e1,x1) & v_mingle(e1) & n_tourist(x1))
exists e1 x1 x2.(n_auditorium(x2) & in(e1,x2) & Actor(e1,x1) & v_talk(e1) & n_people(x1))