A couple dancing in the street.
There are two people
a couple means two
exists x1 x2 x3.(n_street(x3) & a_topic(x1) & in(x1,x3) & n_dancing(x1) & of(x1,x2) & n_couple(x2))
exists p1 x1 x2.((x1 = x2) & n_people(x2) & card_eq_2(x2))