Children sleeping on the floor.
Children are on the floor.
sleeping is a descriptor of what the children are doing on the floor
exists e1 x1 x2.(n_floor(x2) & ne_nam_children(x1) & on(e1,x2) & Actor(e1,x1) & v_sleep(e1))
exists p1 x1 x2.(n_floor(x2) & on(x1,x2) & n_child(x1))