Multiple students sitting on stairs at a school.
Students are hanging out together.
Just because students are sitting on the school stairs does not mean they are hanging out together. Students may just be taking a break and sitting in group of two chatting.
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 s1 s2 x1.(a_together(s2) & Manner(e1,s2) & a_out(s1) & Manner(e1,s1) & Actor(e1,x1) & v_hang(e1) & n_student(x1))