School children in uniforms sit on hill, while eating lunch.
A toilet on the curb.
A toilet is piece of equipment and uniforms is clothing.
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 x1 x2.(n_curb(x2) & a_topic(x1) & on(x1,x2) & n_toilet(x1))