Several people are sitting on wall.
More than one person is sitting on a wall.
several is a synonym of more than one.
exists e1 s1 x1 x2.(on(e1,x2) & n_wall(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_wall(x3) & Actor(e1,x1) & v_sit(e1) & than(s1,x2) & card_eq_1(x2) & Theme(s1,x1) & a_more(s1) & n_person(x1))