Two girls in shorts and T-shirts are laughing while sitting on wooden steps.
Two girls are laughing on the steps.
Girls laughing while sitting on wooden steps must be laughing on the steps.
exists e1 e2 s1 x1 x2 x3 x4 x5.(while(e1,e2) & on(e2,x5) & n_step(x5) & a_wooden(s1) & Theme(s1,x5) & Actor(e2,x1) & v_sit(e2) & Actor(e1,x1) & v_laugh(e1) & in(x1,x2) & subset_of(x4,x2) & n_t-shirt(x4) & subset_of(x3,x2) & n_shorts(x3) & n_girl(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_step(x2) & on(e1,x2) & Actor(e1,x1) & v_laugh(e1) & n_girl(x1) & card_eq_2(x1))