A man is standing before a classroom and speaking.
There is a man in the classroom
If you're standing before a classroom you're likely in a classroom
exists e1 x1 x2 x3 x4.(before(e1,x2) & n_speaking(x4) & n_classroom(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists p1 x1 x3.(n_classroom(x3) & exists x2.((x1 = x2) & in(x2,x3) & n_man(x2)))