Two people talk while sitting by a desk.
Two people discuss their day in the office.
two people talking does not infer they are discussing their day
exists e1 e2 x1 x2.(while(e1,e2) & by(e2,x2) & n_desk(x2) & Actor(e2,x1) & v_sit(e2) & Actor(e1,x1) & v_talk(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_office(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_discuss(e1) & n_day(x2) & of(x2,x1) & n_thing(x1) & n_people(x1) & card_eq_2(x1))