A classroom of students watching a presentation.
A room full of people
A classroom of students is watching a presentation, so is must be the room full of people
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & n_presentation(x4) & (x2 = x3) & n_student(x2) & n_classroom(x1))
exists s1 x1 x2 x3.(a_topic(x1) & of(s1,x3) & n_people(x3) & Theme(s1,x2) & a_full(s1) & (x1 = x2) & n_room(x1))