A couple having a conversation.
There is a man and a woman talking while walking down a street.
The couple doesn't necessarily have to be a man and a woman.
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 p1 x1 e1 e2 s1 x2 x3 x4 x5 x6.((x1 = x2) & subset_of(x4,x2) & while(e1,e2) & a_down(s1) & Manner(e2,s1) & Theme(e2,x6) & Actor(e2,x5) & v_walk(e2) & n_street(x6) & Actor(e1,x5) & v_talk(e1) & (x4 = x5) & n_woman(x4) & subset_of(x3,x2) & n_man(x3))