A large group of kids sit in a very large room.
A group of kids are in class.
The kids are not necessarily in class.
exists e1 s1 s2 x1 x2 x3.(in(e1,x3) & n_room(x3) & a_large(s2) & Theme(s2,x3) & r_very(x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_kid(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))
exists p1 x1 x2.(exists x3.(in(x1,x3) & n_class(x3)) & of(x1,x2) & n_kid(x2) & n_group(x1))