Two men playing hockey on the ice.
The two men are friends.
Men playing hockey could be strangers or enemies instead of friends.
exists e1 x1 x2 x3 x4.(n_ice(x4) & a_topic(x1) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_hockey(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists p1 x1.(n_man(x1) & card_eq_2(x1) & exists x2.((x1 = x2) & n_friend(x2)))