A number of people of various ages sit on blankets on the grass.
The people sit on bleachers inside the stadium.
To sit on blankets on the grass is not the same as to sit on bleachers inside the stadium.
exists e1 s1 x1 x2 x3 x4 x5.(n_grass(x5) & on(e1,x5) & on(e1,x4) & n_blanket(x4) & Actor(e1,x1) & v_sit(e1) & of(x1,x3) & n_age(x3) & a_various(s1) & Theme(s1,x3) & of(x1,x2) & n_people(x2) & n_number(x1))
exists e1 x1 x2 x3.(n_stadium(x3) & n_people(x1) & on(e1,x2) & inside(x2,x3) & n_bleacher(x2) & Actor(e1,x1) & v_sit(e1))