Multiple students sitting on stairs at a school.
Students are waiting for their teacher at school.
Just because students are sitting on the school stairs does not mean they are waiting for their teacher. They may just be on lunch break.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & at(e1,x5) & n_school(x5) & on(e1,x4) & n_stair(x4) & Actor(e1,x3) & v_sit(e1) & (x1 = x3) & n_student(x1) & (x1 = x2) & ne_nam_multiple(x2))
exists e1 x1 x2 x3.(at(e1,x3) & n_school(x3) & for(e1,x2) & n_teacher(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_wait(e1) & n_student(x1))