Two young boys play besides a lake, throwing rocks into the water.
Two boys are skipping stones while they wait for their fathers to come back with the boat.
Two young boys play besides a lake, throwing rocks into the water but they are not wait for their fathers.
exists e1 e2 s1 x1 x2 x3 x4.(n_water(x4) & for(e1,e2) & into(e2,x4) & Theme(e2,x3) & Actor(e2,x1) & v_throw(e2) & n_rock(x3) & besides(e1,x2) & n_lake(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3 x4.(n_boat(x4) & exists e2 p2.(for(e2,x3) & Topic(e2,p2) & Actor(e2,x1) & v_wait(e2) & exists e3 s1.(a_back(s1) & Manner(e3,s1) & with(e3,x4) & Actor(e3,x1) & v_come(e3))) & n_father(x3) & of(x3,x1) & n_thing(x1) & n_thing(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_skip(e1) & n_stone(x2) & n_boy(x1) & card_eq_2(x1))