Three people dancing in the subway.
Some humans dancing.
Three people are some humans.
exists e1 x1 x2 x3.(n_subway(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_dance(e1) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_dance(e1) & (x1 = x2) & n_human(x1))