Two young girls and an older man in a classroom.
The classroom is empty.
Two young girls and an older man are people, so if they were in a room it would not be empty.
exists s1 s2 s3 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & in(x2,x3) & n_classroom(x3) & n_man(x2) & r_more(s3) & a_older(s3) & Theme(s3,x2) & subset_of(x1,s1) & n_girl(x1) & a_young(s2) & Theme(s2,x1) & card_eq_2(x1))
exists s1 x1.(n_classroom(x1) & Theme(s1,x1) & a_empty(s1))