Two people, dressed in red, dancing.
Two people dressed in blue are dancing.
either it can be dressed in red or dressed in blue.
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 e1 e2 x1 x2 x3.(Actor(e2,x1) & v_dance(e2) & in(e1,x3) & n_blue(x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))