People stand inside a rock dome.
People are standing upright.
People standing implies that they are standing upright.
exists e1 x1 x2 x3.(inside(e1,x2) & n_dome(x2) & of(x2,x3) & n_rock(x3) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2.(Time(e1,x2) & n_upright(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))