The boy is leaping into the air.
A boy is trying to jump across something.
A boy leaping into the air is not necessarily trying to jump across something.
exists e1 x1 x2.(n_air(x2) & n_boy(x1) & into(e1,x2) & Actor(e1,x1) & v_leap(e1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2.(across(e2,x2) & n_thing(x2) & Actor(e2,x1) & v_jump(e2)) & n_boy(x1))