A couple having a conversation over drinks.
A couple is drinking soda.
The couple may not be specifically drinking soda.
exists e1 x1 x2 x3 x4.(a_topic(x1) & over(e1,x4) & n_drink(x4) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_conversation(x3) & (x1 = x2) & n_couple(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_soda(x2) & n_couple(x1))