Two people on a bench.
Two people were sitting down
Just because two people are on a bench doesn't mean they are sitting down.
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_bench(x2) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1.(a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_2(x1))