Two friends bike down a hill.
Friends are partying.
one group is biking down hilll while the other group is partying
exists x1 x2 x3.(a_topic(x1) & down(x1,x3) & n_hill(x3) & n_bike(x1) & of(x1,x2) & n_friend(x2) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_party(e1) & n_friend(x1))