A group of young men throwing rocks in a foreign country.
The men are trying to hit something with rocks.
The young men could be throwing rocks at nothing in particular.  Nothing about the fact they are throwing rocks implies that they are actively trying to hit something with rocks.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & in(e1,x5) & n_country(x5) & a_foreign(s2) & Theme(s2,x5) & Theme(e1,x4) & Actor(e1,x3) & v_throw(e1) & n_rock(x4) & (x2 = x3) & n_man(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists e1 p1 x1.(n_man(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_hit(e2) & with(x2,x3) & n_rock(x3) & n_thing(x2)))