Two people, dressed in red, dancing.
Two people were at a prom
The people could be dancing anywhere, not just at a prom.
exists e1 e2 s1 x1 x2 x3.(Actor(e2,x1) & v_dance(e2) & Theme(e1,s1) & Theme(s1,x3) & a_red(s1) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_prom(x2)) & n_people(x1) & card_eq_2(x1))