Two friends partying together.
These three are mortal enemies
People cannot be friends and enemies at the same time.
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_party(e1) & n_friend(x1) & card_eq_2(x1))
exists p1 x1.(n_thing(x1) & card_eq_3(x1) & exists s1 x2.((x1 = x2) & n_enemy(x2) & a_mortal(s1) & Theme(s1,x2)))