The teacher reads a book to the class.
a teacher is reading during recess
If the teacher is reading a book to the class then she would not be reading it to the children while they are at recess.
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.(during(e1,x2) & n_recess(x2) & Actor(e1,x1) & v_read(e1) & n_teacher(x1))