A couple having a conversation.
A couple is talking about future relationship plans.
Not every couple in conversation is talking about future relationship plans.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_conversation(x3) & (x1 = x2) & n_couple(x1))
exists e1 s1 x1 x2 x3.(about(e1,x3) & n_relationship(x3) & a_future(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_talk(e1) & n_plan(x2) & n_couple(x1))