Two couples dressed in yellow are dancing.
Two couples in yellow are dancing to music.
They could be dancing to silence instead of to music
exists e2 e1 x1 x2 x3.(Actor(e2,x1) & v_dance(e2) & in(e1,x3) & n_yellow(x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_couple(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(to(e1,x3) & n_music(x3) & Actor(e1,x1) & v_dance(e1) & in(x1,x2) & n_yellow(x2) & n_couple(x1) & card_eq_2(x1))