Man with arm around girlfriend's shoulder as they watch something.
young lovers enjoy the night
A man with his arm around a girl does not imply they are lovers.
exists p1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & around(x2,x4) & exists e1 x5.(Theme(e1,x5) & Actor(e1,x1) & v_watch(e1) & n_thing(x5)) & n_thing(x1) & as(x4,p1) & n_shoulder(x4) & of(x4,x3) & n_girlfriend(x3) & n_arm(x2) & n_man(x1))
exists e1 s1 x1 x2.(n_night(x2) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_lover(x1) & a_young(s1) & Theme(s1,x1))