Young women and men sitting together on a stairway.
Young couples court each other on the stairs.
Just because they are young men and women sitting together mean that they are couples courting each other.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & on(e1,x4) & n_stairway(x4) & a_together(s3) & Manner(e1,s3) & Actor(e1,x3) & v_sit(e1) & (s1 = x3) & n_man(x2) & n_woman(x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_young(s2) & Theme(s2,s1))
exists x4.(n_stair(x4) & all x1.(n_other(x1) -> exists s1 x2 x3.(a_topic(x2) & on(x2,x4) & for(x2,x1) & n_court(x2) & of(x2,x3) & n_couple(x3) & a_young(s1) & Theme(s1,x2))))