Multiple students sitting on stairs at a school.
A group of students are waiting for their teacher at the stairs.
Students sitting on stairs could be doing something other than waiting for their teacher.
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 x4.(n_stair(x4) & for(e1,x3) & at(x3,x4) & n_teacher(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x1) & v_wait(e1) & of(x1,x2) & n_student(x2) & n_group(x1))