A couple of people sit outdoors at a table with an umbrella and talk.
Two people are having a conversation.
A couple of people generally means that there are two of them.  If they are at a table and are talking, it means that they are having a conversation.
exists e1 x1 x2 x3 x4 x5 x6 x7.(at(e1,x4) & with(x4,x5) & n_talk(x7) & n_umbrella(x6) & subset_of(x7,x5) & subset_of(x6,x5) & n_table(x4) & Time(e1,x3) & n_outdoors(x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_couple(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & n_people(x1) & card_eq_2(x1))