A girl dances with a person dressed as Stitch.
Sally danced with someone dressed as Stitch.
Sally danced with a person dressed as stitch because they are dressed as stitch.
exists e1 e2 x1 x2 x3 x4.(ne_nam_stitch(x4) & with(e1,x2) & as(e2,x4) & Theme(e2,x3) & v_dress(e2) & (x2 = x3) & n_person(x2) & Actor(e1,x1) & v_dance(e1) & n_girl(x1))
exists e1 s1 x1 x2 x3 x4.(ne_nam_stitch(x4) & r_sally(s1) & with(s1,x2) & as(e1,x4) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_person(x2) & Theme(s1,x1) & a_dance(s1) & n_thing(x1))