A couple is dancing in Costa Rican outfits.
There are people moving around.
Because a couple is dancing, they have to be people moving around.
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 p1 x1 e1 s1 x2 x3.((x1 = x2) & a_around(s1) & Manner(e1,s1) & Actor(e1,x3) & v_move(e1) & (x2 = x3) & n_people(x2))