Three people from a country in the east are dancing on a dance floor.
three people are dancing
Three people is repeated in both sentences and dancing on a dance floor implies they are dancing.
exists e1 x1 x2 x3 x4 x5.(n_east(x3) & on(e1,x4) & n_floor(x4) & of(x4,x5) & n_dance(x5) & Actor(e1,x1) & v_dance(e1) & from(x1,x2) & in(x2,x3) & n_country(x2) & n_people(x1) & card_eq_3(x1))
exists e1 x1.(Actor(e1,x1) & v_dance(e1) & n_people(x1) & card_eq_3(x1))