Two girls in pink walk through the park.
The are sisters.
Any amount of girls with any relationship situation can walk through a park, not just because they are sisters.
exists s1 x1 x2 x3.(n_park(x3) & a_topic(x1) & in(x1,x2) & through(x2,x3) & n_walk(x2) & a_pink(s1) & Theme(s1,x2) & n_girl(x1) & card_eq_2(x1))
(x)