A couple of people sit outdoors at a table with an umbrella and talk.
A few people sit outside at a table having a conversation and one of them has an umbrella.
If people decide to talk, that would mean that they are having a conversation.  If they are at a table with an umbrella, at least one would have to have it.
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 e2 e3 s1 s2 x1 x2 x3 x4 x5.(Theme(e3,x5) & Actor(e3,x4) & v_have(e3) & n_umbrella(x5) & of(x4,x1) & n_thing(x1) & n_thing(x4) & card_eq_1(x4) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & n_conversation(x3) & at(e1,x2) & n_table(x2) & a_outside(s2) & Manner(e1,s2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & a_few(s1) & Theme(s1,x1))