Two men are sitting on camp chairs while reading or studying.
some men are sitting on chairs
Some men may be two but could be another number as well.
exists e1 x1 x2 x3 x4.(while(e1,x4) & (n_read(x4) | n_study(x4)) & on(e1,x2) & n_chair(x2) & of(x2,x3) & n_camp(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_chair(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))