asian boys play on a raft in a lake
Boys head out on a lake to drown their friend.
Not all boys are Asian.  Not all boys go to the lake to drown their friends.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_lake(x3) & on(e1,x2) & n_raft(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_asian(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x2 x3.(a_out(s1) & Manner(e1,s1) & on(e1,x2) & Topic(x2,p1) & exists e2.(Theme(e2,x3) & Actor(e2,x2) & v_drown(e2)) & n_friend(x3) & of(x3,x1) & n_thing(x1) & n_lake(x2) & Actor(e1,x1) & v_head(e1) & n_boy(x1))