A man in suit talking behind a podium with a group of people behind him.
A man is talking to the students.
Not all people are students.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & behind(e1,x4) & with(x4,x5) & of(x5,x6) & behind(x6,x1) & n_male(x1) & n_people(x6) & n_group(x5) & n_podium(x4) & Actor(e1,x3) & v_talk(e1) & (x1 = x3) & in(x1,x2) & n_suit(x2) & n_man(x1))
exists e1 x1 x2.(n_student(x2) & to(e1,x2) & Actor(e1,x1) & v_talk(e1) & n_man(x1))