The teacher reads a book to the class.
some kids are listening to a teacher.
Students are not always kids.  Students are not always listening.
exists e1 x1 x2 x3.(n_class(x3) & n_teacher(x1) & Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & to(x2,x3) & n_book(x2))
exists e1 x1 x2.(to(e1,x2) & n_teacher(x2) & Actor(e1,x1) & v_listen(e1) & n_kid(x1))