School children in uniforms sit on hill, while eating lunch.
Catholic school children eat lunch before confession.
Not all children are Catholic school children and they are not necessarily eating before confession.
exists e2 e1 x1 x2 x3 x4 x5.(while(e1,e2) & Theme(e2,x5) & Actor(e2,x1) & v_eat(e2) & n_lunch(x5) & on(e1,x4) & n_hill(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x3) & n_uniform(x3) & n_child(x1) & (x1 = x2) & ne_nam_school(x2))
exists e1 x1 x2 x3 x4 x5.(before(e1,x5) & n_confession(x5) & Theme(e1,x4) & Actor(e1,x1) & v_eat(e1) & n_lunch(x4) & n_child(x1) & of(x1,x3) & n_school(x3) & (x1 = x2) & ne_per_catholic(x2))