four people talking in a presentation room.
Four people talk about their project inside their conference room.
People talking in a presentation room are not necessarily discussing their project.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & n_room(x3) & of(x3,x4) & n_presentation(x4) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4.(about(e1,x2) & inside(x2,x3) & n_room(x3) & of(x3,x4) & n_conference(x4) & of(x3,x1) & n_thing(x1) & n_thing(x1) & n_project(x2) & of(x2,x1) & Actor(e1,x1) & v_talk(e1) & n_people(x1) & card_eq_4(x1))