Two men are having a conversation.
Two men discuss their wives.
Two men are having a conversation does not indicate they discuss their wives
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_discuss(e1) & n_wife(x2) & of(x2,x1) & n_thing(x1) & n_man(x1) & card_eq_2(x1))