The teenage boy and girl are smiling under a red flower.
There is a teenage couple.
A teenage boy and girl can be a teenage couple.
exists e1 s1 x1 x2 x3 x4 x5.(n_girl(x3) & n_boy(x2) & of(x2,x4) & n_teenage(x4) & subset_of(x3,x1) & subset_of(x2,x1) & under(e1,x5) & n_flower(x5) & a_red(s1) & Theme(s1,x5) & Actor(e1,x1) & v_smile(e1))
exists p1 x1 x2 x3.((x1 = x2) & n_couple(x2) & of(x2,x3) & n_teenage(x3))