A group of girls including one in a blue shirt with her back towards the camera are laughing.
Teenage girls giggling hysterically at nothing.
the girls are not necessarily teenagers, and they are not necessarily giggling hysterically at nothing.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_camera(x6) & Actor(e1,x1) & v_laugh(e1) & include(x1,x3) & in(x3,x4) & with(x4,x5) & towards(x5,x6) & n_back(x5) & of(x5,x1) & n_female(x1) & n_shirt(x4) & a_blue(s1) & Theme(s1,x4) & n_thing(x3) & card_eq_1(x3) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & -exists x4.(at(e1,x4) & n_thing(x4)) & a_hysterically(s1) & Manner(e1,s1) & Actor(e1,x3) & v_giggle(e1) & (x1 = x3) & n_girl(x1) & of(x1,x2) & n_teenage(x2))