A couple is dancing in Costa Rican outfits.
A couple are wearing shoes.
A couple is dancing in Costa Rican outfits does not necessary that they are wearing shoes.
exists e1 s1 x1 x2.(in(e1,x2) & n_outfit(x2) & a_rican(s1) & Theme(s1,x2) & r_costa(x2) & Actor(e1,x1) & v_dance(e1) & n_couple(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_shoe(x2) & n_couple(x1))