A girl stands up straight on a sloping street in front of a brick wall.
Nobody is standing.
when girl stands up that means somebody is standing, not nobody
exists e2 e1 s1 x1 x2 x3 x4 x5.(r_straight(e1) & on(e1,x2) & in(x2,x3) & of(x3,x4) & n_wall(x4) & of(x4,x5) & n_brick(x5) & n_front(x3) & n_street(x2) & Actor(e2,x2) & v_slope(e2) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_girl(x1))
-exists e1 x1.(Actor(e1,x1) & v_stand(e1) & n_person(x1))