Young people in summer clothing sit on graffited walls.
The people are sitting on the wall.
the people who are young sitting  on graffited walls
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x4) & n_wall(x4) & a_graffited(s2) & Theme(s2,x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_clothing(x2) & of(x2,x3) & n_summer(x3) & n_people(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_wall(x2) & n_people(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))