Three men sitting near a conference desk with many papers on it.
A man is busy working.
Not all three men sitting near the conference desk with many papers on it is busy working.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x1) & n_thing(x1) & with(e1,x5) & n_papers(x5) & n_quantity(x5) & near(e1,x3) & n_desk(x3) & of(x3,x4) & n_conference(x4) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & card_eq_3(x1))
exists e1 p1 x1.(exists e2.(Actor(e2,x1) & v_work(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_busy(e1) & n_man(x1))