Two boys playing around the shores of a lake with one boy in a teal shirt throwing rocks into the lake.
Two boys are picking up rocks.
One by throwing rocks does not imply two boys are picking up rocks.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_shore(x3) & a_topic(x1) & in(e1,x6) & into(e2,x4) & n_lake(x4) & n_lake(x4) & Theme(e2,x8) & Actor(e2,x7) & v_throw(e2) & n_rock(x8) & (x6 = x7) & n_shirt(x6) & a_teal(s1) & Theme(s1,x6) & with(e1,x5) & n_boy(x5) & card_eq_1(x5) & around(e1,x3) & of(x3,x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_boy(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_pick(e1) & n_rock(x2) & n_boy(x1) & card_eq_2(x1))