A young couple smiling at each other.
The couple is in love.
You can not infer they are in love.
exists e1 s1 x1 x2.(a_topic(x1) & all x3.(n_other(x3) -> at(e1,x3)) & Actor(e1,x2) & v_smile(e1) & (x1 = x2) & n_couple(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1.(n_couple(x1) & exists x2.(in(x1,x2) & n_love(x2)))