Three students are listening to their teacher.
Three students are in class.
Students listen to teachers in class.
exists e1 x1 x2.(to(e1,x2) & n_teacher(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_listen(e1) & n_student(x1) & card_eq_3(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_class(x2)) & n_student(x1) & card_eq_3(x1))