Students are sitting lined up on stair steps while they wait and check their electronic devices.
There are several friends standing on the school stair and exchanging pictures from there electronice gadgets
Just because the students are sitting on stair steps does not mean they are friends. A while they may be using their electronic devices it does not mean that they are exchanging pictures.
exists e1 p1 s2 x1 x4.(exists e2 p2 s1 x2 x3.(exists e3 e4.(Theme(e4,x4) & Actor(e4,x1) & v_check(e4) & Actor(e3,x1) & v_wait(e3)) & while(e2,p2) & on(e2,x2) & n_step(x2) & of(x2,x3) & n_stair(x3) & a_up(s1) & Manner(e2,s1) & Theme(e2,x1) & v_line(e2)) & n_device(x4) & a_electronic(s2) & Theme(s2,x4) & of(x4,x1) & n_thing(x1) & n_thing(x1) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_student(x1))
exists e4 e1 e3 e2 p1 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10.(n_stair(x2) & of(x2,x3) & n_school(x3) & for(p1,e3) & from(e3,x8) & Theme(e4,x10) & Actor(e4,x9) & v_electronice(e4) & n_gadget(x10) & (x8 = x9) & Theme(e3,x7) & Actor(e3,x1) & v_exchange(e3) & n_picture(x7) & for(p1,e1) & from(e1,x4) & Theme(e2,x6) & Actor(e2,x5) & v_electronice(e2) & n_gadget(x6) & (x4 = x5) & on(e1,x2) & Actor(e1,x1) & v_stand(e1) & exists s1 x11.((x1 = x11) & n_friend(x11) & a_several(s1) & Theme(s1,x11)))