Girls sit in costumes.
The girls are wearing school uniforms.
Girls can't wear costumes and school uniforms at same time.
exists e1 x1 x2.(in(e1,x2) & n_costume(x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1))
exists e1 x1 x2 x3.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_uniform(x2) & of(x2,x3) & n_school(x3))