Two people in masks dancing.
Two people are dancing.
If there are two people dancing then there are two people dancing.
exists e1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_dance(e1) & (x1 = x3) & in(x1,x2) & n_mask(x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_dance(e1) & n_people(x1) & card_eq_2(x1))