People sitting and standing talking.
People are talking.
When people are talking they can be either sitting and standing
exists e2 e3 e1 x1 x2.(for(e2,e3) & Actor(e3,x2) & v_talking(e3) & Actor(e2,x2) & v_stand(e2) & n_people(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists e1 x1.(Actor(e1,x1) & v_talk(e1) & n_people(x1))